I'm sorry it took so long to get back to you. I have the same dilemma as you. I'm supposed to have them as well. I can't see too far back on mine, and I haven't seen any 12v wiring. Did Thor say if we are supposed to have the automatic pads that turn on at 45 and off at 65 ish? I have been in low to mid 30s but the bins have been above 45, so I can't check the diagnostics to see if they come on. Sorry.