It's easy mate one of the bulbs goes to the normal beam, and the other bulb goes to the full beam wires. Im not sure but you current light should have like a block connector so somthing going to the bulbs! You would have to cut it off and wire them wires to the new ligh bulbs.
Sorry if it is hard to understand it very hard to expaline lol
Basically the 2 wires coming from each bulb are "negative" and "positive" wires which are for a 12v connection.
Here is a pic i made up for you mate (I COULD BE WRONG, BUT IM 99% SURE IM RIGHT) the wires may be a different colour but it will be along these lines:
P.S i know it is a FAIL pic but just trying to help another DT dude out
-- Edited by CooS on Thursday 7th of April 2011 06:09:30 PM