On this particular boat I simply used heat shrink ring terminals and a Blue Sea Buss bar. This connector did not have any high current running through it, as this was on a later Westerbeke, but I still remove the problematic and quirky trailer connectors as I find they are very poorly suited for the marine environment. Even without any high current circuits they still cause issues.
These heat shrink rings create a significantly more reliable and better connection. Once coated with BoeShield, No-Ox-Id Special A, or similar, corrosion protection & electrical gremlins are virtually a non-issue.