Pistol scope mounts and RIS for a Hi-capa dragon 5.1

Ok so I have a WE-Tech Hi-Capa Dragon 5.1. A rocking pistol that’s dead on accurate and a gas hog. Looks great and is nice and weighty. I want to give it more of a race gun or competition look. I was thinking of putting a reflex scope on it and possibly a flashlight. The questions I have are about the scope mounts, and quick-draw holsters. I’ve seen scope mounts that appear to attach to the side of the frame. It looks like there are three screws that hold the mount to the frame. My first question is how? I don’t see any holes or extra screws on the gun. Second question is that the only option I got? Third is after I get all this where do I find a quick-draw holster? Please keep in mind I’d prefer to not spend a fortune on these upgrades. Any help you guys got would be greatly appreciated.