well, my guess as that one red and one white goto each light. and your right, they need to goto one of the side marker lights. now your only problem is verifying which one of those wires is used for 12v. check your instructions and see what they say. then use a multimeter to test to see which wire off of the side markers is getting 12v when the parking lights are on(use the bulb thats on when the parking light are on). then connect that wire and put the other to ground and you should be in business.