MJT Simply get some of the heat tape/electricle tape, And place it in contact on heat tape but where the bin wont push and shove it! THERE ALSO another way which you could do it semi helps set temp INSIDE if you dont want to play
Step 1: Get some material the the same as your tubs are made out of"
Step 2: Tape the prob onto that material
Step 3: Tape that onto the heat tape (if you use no substrate of course
But many people do the plain ol fashion way of Just taping prob directly on the heat tape (usually mid shelf or as close to mid as u can get)