pic 2 looks like the oil pressure alarm switch. It closes when there is no oil pressure and trips a buzzer or horn.
Pic 6 is the oil pressure sender for the oil pressure gauge.
If the nails were corroded so are the pins and there not coming out, you can try forcing them inward to shear the nails ,but...........................................
A replacement housing is highly recommended
you dont have a choke plate if its a TKS carb and you have no active control of the choke if you do have a choke plate
I have to keep the choke in or else the engine will stall.
With a 2 wire motor you reverse the polarity to acitvate up or down, with a 3 wire you have a ground wire ,and Blue and Green motor wires. these use power applied to 1 wire at a time Blue or Green to operate the motor
