Jim, what's that sticking up above your radar dome? If that's your GPS, you could put a light up there by disconnecting the gps dome at the top, removing the gps puck, put it on a short stick somewhere else (doesn't need to be that high, you may be able to get by with using an internal antenna if your gps has one). Then, pull new wires for a light using the old gps wires as a fishtape down through the radar mount. Or even use the old gps cable as a light electrical cable if it'll handle the current, not sure of the composition of the GPS cable. If you use an LED light, most any cable will work.
That looks exactly like the radar mount I have on Captain's Cat...
Had a similar mount on Captain's Choice, where I mounted the light on top and the puck on the side.
Or put the gps puck where the anchor light is... :wink: I had two GPS on the Captain's Choice, one on the side of the radar mount and one back near the 8' VHF antenna. Have two on the CAT too, redundancy is my friend!
Lots of options, KISS principle rules!! :thup
Charlie