How to model new mechanics onto vehicles that do not have them

Hello. I want to model gyroscopic gunsights in warthunder on bombers and fighter that have them. For offensive weapons, i want it to give the radar lead indicator when a target is selected and is in the FOV of the gunsight. For bombers I want to add the arcade lead indicator, and for turret convergence to be the target’s distance. How would I go about doing this?