Removed the mounting shelves for the SV-EMS-220 and SV-COM-425. Removed the equipment from them. Drilled holes to mount the Nav/GS antenna diplexer to the SV-COM-425 shelf. Installed nutplatest for #8 screws.
Attached the diplxer to the shelf and reinstalled the equipment.
Reinstalled the SV-COM-425 shelf.
Cut the nav/GS antenna to lenght and installed a BNC connector. Hooked the terminated coax to the dyplexer.
Reinstalled the SV-EMS-220 shelf and reconnected all connectors that had been disconnected for the removals.