Parking brake has no manual adjustment on this car.
You set the spring tension in the parking brake handle,hook up the cables at the equalizer,pull out a nail holding the tension and it's set.

When I would check the drums in the past before the work the drivers side would leave a ring of brake dust on the ground when laying the drum on the ground and the passenger side would leave pretty much no brake dust on the ground.

Don't know if that will change after the work.
I checked them before the work and they would apply/release on both sides no problem.

I have a set of new brake springs lying around at home,but I don't know if that would make any difference as both sides apply/release.