I re-read this and see you ordered a Pro-Products RHP.
What did Bob tell you as far as placement? Usually he will have a list of questions for you and then advise on the best placement based on what cage brand you have, size of the cage, species of snake, room temp in the room the cage will be, and other factors.
If that was not conveyed to you during your purchase order, I suggest you call them back and then follow the advice you are given.
The post I linked shows one of my earlier cages with a Pro-Products RHP.
I followed the advice I was given and it has worked for all of my cages with absolutely no issues.
In all 3 of these cages, the panel is on the left side, and the thermostat probe is on the far right dangling at floor level.
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