On this led, the leg with the brown resistor was negative? ( Before soldering it would be wise to test it in the door first to make sure of correct polarity for your led to light up on this one)and went to the closest metal contact. Then the other leg ran to the opposite metal contact. Made sure the legs would never make contact with each (avoiding a ground out) by first using a screwdriver to keep them as close and flush to the body and base as possible then after soldering them permanently into position ; I hot glued all around the metal legs so they wouldn't bump into each other,ever.