Ok- you are making progress. Congratulations.
First bit of advice. Resist the temptation to clean anything yet. Its more work now cause stuff is in the way.
You want to remove the switch stacks next. Looks like one may be missing a screw from pix or maybe you started. So pull all switches off. Pretty self explanatory- two screws each stack. Just count spacers and take pics frol a good few angles and close up and wel back.
Then- on turn to the electrical side with the brass wipers. That you remove by taking your fingers and holding the sprocket on the mechanical side while using a pliers to loosen nut and lock washer on center spindle on the electrical contact side. This is all easier if you unscrew the unit from the playfield. Typically this is four wide head wood screws- two per leg.
Then the whole thing comes out into your hands and you start by taking photos. Then remove springs- careful with larger center spring. This sometimes gets tightened over the years as an effort to “fix” it and can realy make a mess if you release it and it uncoils. Keep your hands on it and unwind it a bit. If that makes sense.
Then more pics and you can take off the levers and swing arms the coils accuate. Then remove the sprocket and if ambitious strip remaining assembly down. Clean everything and hit rewind to assemble.
Did I mention take more photos from more angles than you think you need- as each layer of the onion is removed.