With the help of a channel viewer, I was able to source some original plans for the Station and we weren’t too far off the mark with the plan I had guessed.
0:00 Introduction
1:24 DCC Speaker Update
3:12 Station Floor-plan Recap
7:37 Original Station Floor-plan
13:00 Original Station Elevations
16:20 Comparing guessed floor-plan and original floor-plan
17:46 Conclusion
Roads & Rails speaker wiring instructions
https://www.roads-and-rails.co.uk/pages/speaker-wiring-instructions