An 18mm nut and bolt secures the lower control arm to the rear knuckle and must be removed.

Like the strut-to-LCA bolt, this may require "finessing" the lower control arm with a jack to remove.

When reassembling, torque this to around 35ft-lbs. You will need to do some prying with a pry-bar or large screwdriver in concert with a jack to get this realigned so you can re-insert the bolt.

After this step, the lower control arm should move freely.