there shoyuld be a plug from each bulb assembly and should be a area on the back of one of the plugs to plug one of the lights into...i thought the same thig with mine, your brights will be seperate from your dims...in my sig those r just my brights...my dims r the outermost but they only come on when u have dime, so if u use brights only one set comes on , not both...i hope this helps

jason