After replacing connectors (masthead and/or foot of mast) do seal them using self-vulcanizing tape (can be found at your shipsandelr or electronics
store). Ask them to explain how to use it if you haven't before.
A good quality one like 3M will do wonders. If I cut one open that has been on a plug
even after many years the plug
comes out as shining & new.
Cover/protect it from the elements such as UV with standard isolation tape.
As for DC wiring
: I've wired mine directly to the main + and minus 12V posts of my electric
panel, no switches in between just the necessary fuse wired closely to the panel connection.
it directly to the service battery
bank with heavy gauge wire is even better but it did not given the risk of battery
drain if I left the VHF
on unatendedly for a long time.
My HAM SSB
is directly wired to the battery bank but then thios one draws 23A and I always switch it off completely (power and antenna
wires) when I leave the boat.