I installed the Progressive Industries EMS-LCHW30 in my 2018 clamshell today. It was quite easy. All you need to do is strip some wires (careful not to nick conductors), and turn some screws. I was pleased that I didn't have to put in any extra wire. I cut the existing orange wire from the exterior power plug to the converter and there was just enough slack in the wire to do the install. My choice of mounting location was key to making this possible. See photos. The unit is screwed in with only three screws, but that's plenty. The screw on the right side goes into a super thin fascia, so I used a drywall anchor, which seems secure enough. Hope this helps someone.