Seat Heater instal with Clazzio Covers and airbags

I have a 2013 trd or double cab. I have had Clazzio leather covers installed for the last 8 months or so that I love. I just purchased a seat heater kit with switch blanks, but could only find the install guide for older second gen trucks. My questions are...
1. Is there a newer tutorial I just didn't see?
2. Because my seats have airbags is there any special precautions I need to take?
3. Is it better to install seat heating elements under the factory seat fabric or should I put them on over, but under the clazzio covers?
4. Is there a way to run wire harness to the switch blank in counsel to hide the wires?
Thanks for any other suggestions as well, would appreciate any input from someone that has done this mod.
Thanks

 

LoLo,
Call Clazzio and ask for Danny, he'll answer any or all of your question. As for the heater pad placement, just put it between the factory seat cover and the Clazzio cover, this way you don't have to remove the factory covers and the heaters will warm up much quicker. As for the wiring he provided me with all the information on how to run them under the carpet to the console and fish them up to the front and connect them to the accessory plug (cigarette) lighter wire. He also assured me this is the best place to make your attachment and would provide plenty of power for both seats. Last thing, Danny said to make sure you get a good ground for the heat element, as long as its a good body ground connection you'll be just fine. Clazzio is a great company to work with, excellent customer service and they provide a great product. Hope this helps you out.
SGM Moose