New cable inside pulpit

[Ailatan]

I have to modify the pulpit because the current one is too big for a code 0 and in the process I was thinking of renewing the cable that runs inside the pulpit.
As the room is very tight I am afraid of losing the guide. Anyone has done it and can give me advice?
I read that the cable has to be of a special type to avoid corrosion by the sea water, any advice on that?
Thks in advance.

[symphony2]

The cable needs to be tinned. You can attach the new cable to the old to pull it through.

[Ailatan]

For de benefit of others, I thought that the cable followed the shortest way but instead it follows the green line