Yeah, I had a talk with Gary Hall a long time ago on the Goose, where he recommended "Morse boat cables"...geez, does 40 years go by in a hurry...
Attached is a picture of the Goose headlight lever with its top off--the cables here were replaced (on 8ma1046), but this style of control cable (where the end fitting pin goes directly to the body conduit) seems to be hard to find nowadays...