build a collar and put the temp controller through that. I did mine where I didn't put any holes in the freezer at all so it could be converted back if needed. If it were me, i would just put the probe between the lid and freezer until you have time to build the collar. FYI, when you build a collar, the higher your collar, the more you can fit in it! I use mine to store beer, wine, juice etc., so it is nice to be able to stack those things up on the compressor shelf.
"The mouth of a perfectly happy man is filled with beer."
- Egyptian Proverb
The Keg Ran Out Club (KROC)