LCA and Pivot Shaft Question

I am in the middle of replacing bushings in the lower control arms. I purchased a set of DuraLast bushings. The pivot shaft slides in the center of the bushing without the aide of a press. If I recall, I had to press the shaft out. Is my memory correct, or does the inner shell actually pivot on the pivot shaft? If so, what retains the LCA on the pivot shaft, the strut rod?

Thanks,
Aaron