Motorcycle headlight three prong to dual two prong?

I recently purchased a new motorcycle headlight (http://moto-madness.com/catalog/index.php?main_page=product_info&cPath=7_337&products_id=303) for my bike (2005 Kawasaki z750s). My new headlights have a three prong H4 plug assembly, however my bike also two headlights, but each is individually connected to two prong connections (I'm assuming one dedicated to high beam, the other to low beam). Will I have to rewire this? Would I need a new harness or is there a work around to merge those two two-pronged connections into one three-pronged connection?