I want to install a coin door in my cab eventually but I have absolutely no experience with how to do this. My cab is a unusual shape (you can look at my other thread for pictures if needs be) The door to my cab, on the front, is ever so slightly curved and my concern is if I was to buy a coin door such as this -

it would sit awkwardly. I'm not even a 100% sure how you secure a coin door. I'm guessing that I cut a hole the same size as the coin door into the cab but then how do I attach it to the cab and with what?
If anyone could give me some tips because I don't want to fork out for a coin door that may not fit into my cab... suggestions please! As I say the curve is slight but its still a curve all the same!