The rig with the spring loaded cam cleats is almost certainly your mainsheet, and the one where the line jams into a V-groove in the block is your vang. At least, based on my H23 setup. As has been noted, you will need a setup like these to get 4:1 advantage. When I bought my boat, which lacks any factory setup for raising the mast, the PO had rigged a separate 4:1 system using some blocks, not sure where he got them. Neither had a becket for the line, so he drilled out one of the sheave pins and installed a shackle in its place to attach the line. It has enough line so that when the mast is down and the blocks are far apart, the line can go along the deck back to the jib winch plus maybe 5 ft extra. That is nice, as it makes it easy to use the winch to help pull it up, and there's a cleat right there if you need to stop in the middle (like to unjam the shrouds when they catch on something not if, when
).
That said, it may not be inexpensive to fashion a second setup just for stepping. In your case, both the vang and mainsheet seem to be too short to use at all. I can't tell from your photos if the pins in the becket are removable or not, as I can see the line has a spliced eye on the becket. If the pin is removable, you could buy enough line to (at minimum) reach from the anchor locker eye to the upright gin pole, plus extra to tail it. If it were me, I'd spend the extra $20 or so to make it long enough to go aft and around the jib winch and on the cleat. That would likely be a hassle when used as the sheet, as it'd be very long. You could live with that, or if the becket pin is removable, put the shorter line back on to use as a sheet. Or, I suppose you could attach the soft eye to the becket with a shackle if the pin is fixed. You would not need a spliced eye on the line used to do the mast raising - a well tied bowline would be enough, which could be slipped through the shackle. Less convenient that a separate set of hardware just for mast raising, but the line and shackle would not cost as much as new set of blocks.