Hi All and hope everyone is well. As a 'newbie' (or, more accurately, a 'returner') I'd very much appreciate any and all advice on hard-wiring a Hornby J36 TTS decoder to a nice old (1975) Airfix 2-6-2 GWR 6100 class side tank steam loco (Prairie) with no DCC socket. I am foxed by: 1) there being two red wires; 2) whether I need to go further than showing chassis/engine and remove main drive wheels to make this possible; 3) how to wire to the copper/plastic pieces behind the middle drive wheels. Any and all thoughts welcome! Some images attached. Thanks, All.