Pulled apart the panel and removed the radio trays in order to fashion short lengths of coaxial so that connecting these later will be easier. Since there's absolutely no room to get a hand in to the back of the radios, the short lengths will protrude out in an open area behind the subpanel and be affixed to a cross-member. Also made a short length hinge pin so that the Map box door can be removed -- only when the panel is out. No pictures today.