Extract the zip file into cdda/data/mods and then enable in the game. If you are using the launcher, be aware it is known to delete things including saves, config, and mods if anything in the cdda folder is open, and windows often opens files without any indication.
Both speedydex and statsthroughkills have one-time-only per character ingame configuration, both of which show the first few upgrade points so you can tune them to your liking, so be sure you find settings you will be okay with before you close the menus.
If you want to activate them on an already existing game, open the mod’s folder and copy the ident from modinfo.json into save/worldnamehere/mods.json while keeping the same format (comma after every entry except the last)