Lenco actuator replacement

[seasams]

I'm trying to replace the Lenco actuators on my 2003 2520 and the wire feeds through the transom below the deck. What is the procedure for this? The wires are not accessible as far as I can tell. They are below deck outside of the stringers.
I'd like to have a plan before I start tearing things apart.
Any advice is appreciated.
Thanks.

 

[southofblock]

Thank you seasams. Interested in any comments or suggestions as well. Same issue also for underwater led lights, one of which needs replacement.