Having a plethora of antenna wires coming in from all over the plane, I wanted to be able to route them all to one common header, then have patch cables to connect the appropriate antenna into the panel. I made my panel removable, so this will allow for easy disconnection for removal, as well. I realize I’m going to loose a few dB using this connection, but I chose bulkhead connectors that have a cable crimp on one side and BNC on the other, so only on side of the connection is lossy, not as bad as a BNC-BNC union.
Pretty straightforward, aluminum bracket with a bunch of holes mounted behind the panel. Really cleans things up.