UTH stands for UNDER TANK HEATER. meaning to be placed under the tank. I know there are people who place them on the side of the tank, how ever the snake doesn't get the proper belly heat they need for proper digesting. I realize you meant it only as a temporary solution, but there are some who may see what you wrote and take it as being a proper way of doing things.
Please get a thermostat or rheostat to keep your snake safe. I can tell you when I first got Tiaga, I had no clue about temps or anything (I was one who didn't do much research ahead of time). But I found this place and found out how high the temps of a UTH could be and knew that could harm Tiaga if I allowed her/him to continue on a UTH without regulation.