So I tried to figure out my parking brake today and I think I found the problem. The small cable joining the parts on the inside of the drum is missing on the left side.
Does anyone have an extra one lying around? Or an old axle that I could steal one from?

Left side

Right side with the cable intact
Does anyone have an extra one lying around? Or an old axle that I could steal one from?

Left side

Right side with the cable intact