I did some research figured stuff out what the tiny nozzle was. (fuel pressure regulator)

This is the nozzle im talking about https://imgur.com/b4utAFD it goes into the intake manifold

This is my fuel pressure regulator https://imgur.com/2ydmed3 That stem, goes it plug into the fuel pressure regulator at the end of the fuel rail or here https://imgur.com/GUh3hHw

Last question Can I use the cars preexisting wiring to connect my electric fuelpump?