What are these items?

[chad1966]

This is mounted on the drivers side bumper shock. It has a yellow wire attached and runs all the way inside the car to the center. It is not connected to anything almost like it got pulled out of its connector.
https://www.dropbox.com/s/lc7d0786rl...2015.32.34.jpg

This knob to the left of the A/C rotates back and forth. I have no idea what it does.
https://www.dropbox.com/s/zzxy911kx7...2015.33.41.jpg

This I believe comes off the fuel pump but is not connected to anything. ???
https://www.dropbox.com/s/4lnqf3x5m1...2015.39.25.jpg

Last but not least what do I do about the broken throttle cable adjuster. Do they make a metal replacement? Thanks.
https://www.dropbox.com/s/jnq8w5fk5u...2015.39.44.jpg