I'm stuck in 1st person inside the cabs, no mouse or cursor movement apart from left and right cab side swap, no matter what combination of mouse and buttons will get me the correct cab drivers panel view. I can simply see the very top of drivers control panel and the windscreen view. I can't look up, down, left , right and have only HUD controls. This is in all scenarios.
You sir are quite correct, As much as I intended for this to go into Train Simulator 2021 it seems that even I am incapable of following what should be a simple path to the correct location. Apologies to you all.