Sorry for lack of information in the original post, reptile basics rhp. When I fasten it to the top of the cage, the two ends with the screws are flush, but it rotates slightly making it so that my snake was able to push itself in the crack and maneuver in the hollowed out part in between the heater and the roof of the tank. I might try sanding down the ceiling of the tank in order to make it flush. I'm not home now, but I actually unmounted and turned down the rhp to about 80 degrees (VE-100 is the thermostat i use). I'll definitely give and update when I get home, thanks for the thoughts.

Here a picture from last night before he climbed up there, I forgot to get a picture this morning:
http://imgur.com/u5x2Ndx