As far as the terminal board (terminal block, terminal plate) , I assume you mean something like this:
You may or may not be using all of the connections (they come in different standard lengths, and might have more connections than you need).
Now, I can't remember which wiring diagram I sent, so I'm starting over with this:
The lower diagram is actually an continuation (to the right) of the upper diagram.
On the upper diagram, item #1 (to the right of the headlight, with little spots inside of it numbered 1 - 11) is the FRONT TERMINAL BOARD.
On the lower diagram, items # 17 - 20 comprise the REAR TERMINAL BOARD.
These show how many wires go to each terminal connection (example, terminal #3 in FRONT TERMINAL BOARD shows 5 wires connecting to that one terminal, #s 9 & 11 are not used).
Now your wire colors MIGHT not be stock.
In which case a multimeter would help you chase the wiring:
Also, do you have a Fat Bob tank center dash ignition switch?
Or a key switch mounted somewhere else?
If the dash switch, this might help:
If a key switch, three wires would be:
1 - hot lead coming INTO switch
2 - lead going to ignition, brake light, instrumentation (for running without lights)
3 - lead going to lights (headlight, taillight) for ignition AND lights.
Hopefully, this will start you off.
Fire back with any questions