I have a 2007 34' Mainship Pilot Hardtop where I have to remove the radar dome for transport. I haven't removed the top half of the dome yet but it looks like there are 4 bolts at the base. Do these bolts have nuts under the hardtop? Thought I would ask before I try and remove the headliner. I just read through the thread on replacing the headliner which provided a lot of great info. Thanks!!