see the link below, it tells your want you need to do and purchase, if the place you are buying the euro hella headlights have the adapter buy it from them, then make your own y adapter, the guy on ebay is charging too much for kit that cost 45 bucks, all he did was cut one end of the plugs and made it into a Y adapter that are used in cars in NA.
perhaps Mods can make the DYI link a sticky since this is the third time i think I've posted this link for fellow member.
2004 BMW 325i Touring SGM
2005 Suzuki GSXR 1000|1992 JDM Civic SiR RHD Black
2000 BMW M5 Avus Blue (GONE)
2002 BMW 325i Touring TVM (GONE)
1994 BMW 325i Saloon Black (GONE)