What are these set of plugs for?

Another question, my clutch pedal just springs back and forth it'll either stick to firewall or pull on it and it shoots back at "home" position. I'm aware it needs fluid pumped through probably but could there be another explanation. Currently the car won't start and I think that my clutch safety switch is the reason cause that sensor behind the pedal doesn't have anything plugged in to it.. Sorry for all the questions. Any kind of help would be appreciated.
Car is an 89 coupe with ka24de swapped in but never finished (got it this way)


