Well..... I didn't install them exactly like they recommend. I have seat covers so I just put the pads on the seat(they have tape to hold the lumbar one in place),put the seat covers back on and wired it up. Another reason I did it this way is because I couldn't open the stock seat covers to save my life---have no idea how to get inside those crazy things. Spent about 15 minutes cussing at the seat hoping it would open up but it didn't so I took the easy route. I may, at some point, have an upholstery guy install them "correctly".
Oh, after deciding to take the slacker route it took me 25 minutes to get it done.