Hi, my Prado came with fabric seats but I have swapped in a full set of leather interior from a UK Colorado. I have run a 12v from the battery to run the power seat adjustment, it works perfectly. The guy i got the seats from also gave me the harness for the heated seat, with the control switches. My question is, is it a plug and play if I want to run the heated seats too? I remember the harness is connected back to below the black plastic cover where the gear lever is. I am not very electrical minded, hope someone can shed some light, thanks.