The rear of the control panel
The front of the control panel with inter board connectors in place
The first thing I did was make a small wooden frame to secure the styrene panel to, I attached it with the connections on the outside so I could more easily solder the wires in place. I knew what needed to go where except for the pin connections on the 6 pin DIN plugs, I looked at the way I'd wired the first socket in the Underhill wiring bunker... however it turns out that spatial awareness is not my big thing so the first way I soldered it all together I ended up with 16v AC on the track and the controlled supply going to the signal. Doh! Anyway after changing that all round all was well so I made the cut in the rails with great trepidation. I needn't have worried trains run over both joins with no trouble at all. I haven't taken the boards apart and put them back together again yet but one thing at a time.
The signal lit up and a train about to pass