on ebay at a pair of the Hella Gen 3 ballasts, it says they require a male end 9006 to hook up to them. Wether thats accurate or not i do not know, but you mention a wiring harness so its plug and play...what exactly do you need for the wiring to make it plug and play? I dont remember which end is which on the Z32 harness, so bare with me if this is a stupid question.