Question regarding '68 brake light switch

[ltdmstr]

The factory repair manual shows the '68 C10 has a button type brake light switch mounted on the pedal arm inside the cab. My truck had a pressure style switch on the front of the master cylinder. Does anyone know if the mc mount pressure switch is a factory setup, and whether there should be a mount inside on the pedal arm? The reason I'm asking is I replaced my manual brakes with a disc/drum setup and new mc with hydroboost and the new mc didn't have an outlet for the pressure switch. I know I could have mounted one inline somewhere, but I thought a mechanical switch would be better and at this point I don't want to mess with the brake lines to add one. So I'm going to use the button type mechanical switch and am thinking I need to figure out a way to mount it. But if there's a tab or something in there already, I'll find a way to get at it.