On my 2013 TriGlide, I want to replace the license plate lamp bulbs to LED. The supplement service manual, states to remove the lamp from the back of the trunk door. Is there another way I can go without removing the entire lamp off the trunk door? If I do need to remove the lamp from the back of the trunk, the supp. manual states you need to take off the two locknuts that is holding the lamp. The parts catalog does not show these two locknuts. What is the part number for these two locknut or what size are they. I have not started any disassemble and just planning ahead before I start.