Originally Posted by tkrussell
Is this a piece of baseboard heat? Why is it an inch away from the wall?
All that needed to be done is leave the feeder cable long enough to span the one inch space and enter a cable connector in the heater.
If you already have a box that will be behind the heater, you can put a blank plate with a knockout , attach a threaded nipple, with locknuts to the plate, having wires come thru the nip, then mount the heater onto the nipple,again connect with locknuts.
DOes this help? Get back with more details and questions if needed.