Cloth to Leather with no existing wiring
 

Finally picked up a set of leather seats @ a reasonable cost but discovered that im not one of the lucky guys that has wiring already in place for them.

So ill have to wire them up myself, which im comfortable with but I've a few questions. Ive seen the wiring diagrams online so im happy that when i chop the connector block off the seats ill know what does what.

1. Where should i take the feed & earth from?
2. Should i use a relay and an inline fuse holder after the buttons or just go straight to the heater elements?
3. What thickness wire should i use?


Thanks guys

P