Thanks for the replies and the suggestions. Very nice set up in the pictures. I am out of town right now but will probably opt to splice the wires. The Garmin mount has access holes at both guard locations so I can run two wires through each one. I want to route the remote mic too. I expect to add the AIS option for a cruise to Nova Scotia in the fall. That is a lot of wires.
It occurs to me that a piece of PVC pipe inside the pedestal guard that goes through the cockpit floor, is sealed in place, and is rises up inside the guard high enough to keep water in the cockpit from leaking through the hole drilled in the cockpit floor might be a necessary step. The wires from the guard would run down through the PVC pipe and through the cockpit floor. How did you seal that opening?