Boost Gauge HELP

[j_biggz]

When I bought my gst it had an aftermarket boost gauge already installed so I never payed much attention to how it was connected. When I am boosting the needle shakes like it has a leak and so I did a boost leak test today and actually found a leak. fixed the leak with some epoxy until I can get my FMIC. So after doing some research on here about how to connect one up I believe mine is connected incorrectly. I have a picture that I will post with this to show you how its connected.

My second question is related to the second picture. I point out the line I beleive is the correct line to tap off of and there is a plug thats not connected and would like it to be identified if possible. I have another question mark next to a third connector that I would like identified. Any advice/tech would be great. Thanks in advance

 

[SpawnedX]

Yes, tap there.

 

[j_biggz]

so my question is what is that black and green plug used for and what is the other open line for?

 

[razrman8]

That, my friend, should go to the ignition coil pack.

 

[j_biggz]

I'm assuming your referring to the plug that isn't connected. The car drives and doesn't have any problems to my knowledge. Where should it plug into and what if any dangers am I risking with it unplugged?