Single To Dual Chambers

[2.0_Nick]

I have a mk3 golf with single chamber head lights . I have been trying to swap them out for a set of smoked ecodes(dual chambers) for a couple of months now. I have read up on here but I still dont know how to wire them in. The lights came with a wiring harness but it does not plug in to the harness I have currently. Would I be better off wiring in a gti harness or does anyone know exactly what I need for this swap? any step by step instructions? Any help would be appreciated thanks

[2.0_Nick]

Found some stuff out but one quick question. Is the section of the harness that runs from the fire wall to the rad support the same for both dual chambers and single chambers?