The piston on the slave cylinder pushes on that lever on the clutch housing, but the two are not actually fastened together with anything. The tension from the slave cylinder and the piston holds itself in place in the "socket" on that lever. If you remove the two bolts holding the slave cylinder onto the transmission (and of course the hydraulic line), the entire slave cylinder comes right off without any extra work in terms its contact with that lever.
When doing the clutch line you'll need only a small bottle of brake fluid. You will lose much less than that but bleeding it kinda sucks (or at least it did for me) and takes a lot more fluid than you'd think, because air gets into the entire system from both ends when you remove the stock line and replace with the PRL.
See my DIY for pics on the line install.