Ok, so the mx5 seats i have in the bus have heating elements in them. I've hooked up a direct 12v on them and it feels like the heater elements are still working so i'm planning to wire them in properly. Google comes up with some wiring diagrams showing folks wiring seats in with a relay switching to a direct feed from the battery, which i'm guessing is so that there isn't a big voltage running through the switch? I'm planning to have mine fed from the leisure battery. I have a feed from this direct to the front of the bus into a small fuseboard. I have a toggle switch rated at 15A. Can i just wire it up direct to this, or would i need to add a relay too? Thanks.