1981 250 XC first of many dumb questions

Picked up a 1982 250 XC this weekend plans to restore or at least get running to have some kicks. Bike is in fair condition but needs work. Has the twin rear Ohlins, but can not seam to figure out how to remove the upper shock mounts, the center stud is tapped and threaded in the center to attach side panel and is outer diameter is round so don't quite see how to remove and does not appear to be a snap ring either, what am I missing here

Paul

that little m6x1 is all there is for hardware must just be stuck pull harder maybe a shot of PB blaster

Thanks that was it, was just nervous about breaking something early on the project. Shocks/Forks should come off tonight along with the Engine/Carb and send out for some refreshing

I was not sure if the shock mount pulled out of the 82 frames like the 83-84 frames do. Of course I never thought to pull them out unless they looked like they needed to be replaced.