you should have 3 wires, live, earth and ign live. live & earth are easy, live plugs into a spade terminal on fusebox, earth to the earth claw above the fusebox. ign live feed needs to go to plug 'D', either 9 or 11 is factory. you'll probably have a random black ignition live wire hanging out of plug D join it to that. have a read of my fusebox faq, should help clear this up for you.
if you dont have a relay and just have 2 wires, you'll only have ign live and earth. if so you can wire it up as above just ignore the bit about the live wire. If it was me though I'd wire in a relay as per factory.
I'm in bracknell which is 60 mile away, if you can drive it to me I'll sort it for you