Hi Ralph
Assume you mean an electric winch. This is for your halyard and other lines on top of cabin.
I had a electric fitted from new. 2013 Vision, Great idea.
I think your only access in as you say, via the locker above engine.
The only thought I had was remove the locker door, give you a bit more room.
If it’s a Lewmar winch you might be able to retro fit the electric motor and gear box to your existing winch. Also you will need to run some heavy gauge cable, electric chew through the amps.
Cheers
Club 56