How do I identify pos/neg on an acura seat heater I want to

[CanuckQx4]

Im trying to figure out the polarity on this set of seat heaters I have. Each heater pad has a green/yellow and a solid yellow wire.

They are meant for an acura but are the perfect size to just install under my trucks leather.

It says 12V DC right on the heater but no positive or negative wire indentification. I just want to wire these up straight to my rear batteries on a toggle with a fuse.

I tried hooking a heater up straight to the battery just to see if it would warm up and it got warm with either polarity so I dont know which to go with

Any help??

[sx moneypit]

Shouldn't make any difference, but if you can tell me what model and year Acura it is i can find out for you.