I finally figured out how to solve this problem. A little embarrassing. I stood facing the stern, with feet on both the Captain and Mate's seats, and with the overhead hatch opened. Then stuck my head up into the hatch opening. You can then reach the anchor light latch with your left hand, raise the light pole, and relatch.
Voila, problem solved.
Sorry to have bothered the Forum with my need for gymnastics. I am a happy boater. If you have a Freedom 325, this solves an issue you might have in deploying the anchor light.