SGR, I wired it directly as stated in the manual...
Looking at the manual and trying to trace what is happening with the wires, it does appear that wires #121 & 126 are installed after the relay on the harness for the starter.
I take it that Classic Roadsters at the time were not thinking about manual transmissions when creating the harness. Who knows.
I am guessing that the reverse lights will have the same issue and will need a relay.