How hard to replace throttle/shift sidemount

[brianct12]

Thanks all for the help.
Here is a photo - *not actually my boat but the set-up is exactly the same. * There is already an 8" access plate just behind the control. * *I dont see any screws on the outside that would secure the control ... and I wonder what kind of bracket might be behind the sidewall. * Wonder if whats back there can come thru the 8" hole - *or if it needs to be dragged back further to the rod box. *Obviously, I need to give this job a closer look. * But if anyone has already done this removal - * I'm all ears. *Thanks