Being non-mechanical I tat a lot with electrics (ask Autosparks) so I thought I'd have a go at getting the seat-belt warning light working so it comes on if the drivers seat-belt isn't plugged in with the ignition.

Haynes advises there's a switch somewhere. Is it built into the seatbelt buckle where the seat belt clips into ? If so should there be some wiring in a loom to feed to the dash ?
Any ideas ?