ok, GET THAT TAPE OUTTA THERE!
If your getting a baby boa, set it back up on it's bottom.
not sure on the hot spot, go read some care sheets. READ READ READ!
Go to
www.google.com and type in boa constrictor care sheets.
Then when that is done. Put the probe ON TOP of the UTH (in side the cage, the uth should be on the outside though)
if you have no dimmer or rheostat get one, UTH's can get WELL over 110 degrees.
once you have your dimmer (like a lamp dimmer) plug it all up. and watch the temps.
What is your room temp normally?
Another suggestion.
Do everything just typed and get a rubbermaid instead. If I am thinking right (and I might NOT) be but, Columbian boas need a bit of humidity, and a tank isn't going to cut it. The light is just going to dry it out.
for the first month or so you are going to want JUST news paper or paper towel until you can figure out if there are no mites. and you get a fecal done. if you don't have a vet or don't know of one go to
www.herpvetconnection.com
if you do leave it on its side, make sure to bungie it on both ends and in the middle, or expect the snake to escape. heck, throw a 4th one on there just for saftey measures!
And since it is a Columbian boa constrictor be prepared to build a custom enclosure as they can get anywhere from 7-12 ft long, And eat rabbits.
Welcome To Ssnakess!
right now.. i have the 2 probes from the thermometres hangin (taped) from the top of the glass in about the center of each end.. i have it about 1 cm or so off the bottom of the glass.. i have a UTH pad under the entire tank (cause my room is a bit cold) and i have a lamp wit a 40w bald on top of the glass on the "hot" end, but its actually shinin right on the tape that i have for my hot end probe ( would that melt the tape? and i was also wonderin wut temp i should be aimin at in degrees.. i hear 80-85 in cold and 85-90 in hot? i might be wrong ( top of my head ) im gonna have aspen beddin on top of a layer of newspaper.. still need to make some hides for him.. i was juss wonderin if the probes are setup right and if tilting my tank would be a good idea.. ( i dont want anythin spillin out though ) the tank has a lil lip on it, juss hope its enough. and also wonderin where the thermometre (wit humitity) gets the readin for the humitity.. because my thermometre itself is outside of the tank.. ( called "Thermor" bought at home outfitters ) any help of suggestions would be greatly apperiated 
and thanx for ur time 
Although rubbermaids are great for baby boas, if you are dead set on a tank it may work as long as your house isn't too dry. They don't need high humidity (50% is fine), so they can be kept in tanks sometimes. If you do, make sure to close off at least three sides so your snake doesn't feel too exposed. Trevor (Boidkeeper) keeps several of his snakes in this type of setup, maybe he will post some pics for you. I keep mine with a temperature gradient of 80-95 or so. The cool end isn't as important as the warm end, so if it is a bit lower than 80 that's also fine, just as long as the warm end has the correct temps. You want to be measuring the surface temps, so you will want the probes touching the surfaces your snake will be. Good luck with your little boa! They are fun snakes to have 
um wit my heatup up even at max the temp only went out to like 80F but wit the lite on it was like 85.. ( still not too great ) i wanna get about 80 on cold side and at least 90 on the warm.. cold side only hit 70 
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