I just bought a 92 NA at auction and have some questions about my vacuum lines. I am new to working on cars and especially new to working on Zs. The diagram I am working off is this.

https://z32.wikispaces.com/file/view/nadiagram.png

However, this is what my current vacuum situation looks like.

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I have a few questions. FIrst is should I simply work towards the first diagram, or is my system fine the way it is set up. And if I do need to return it to "normal" what do I do with the plug on the drivers side where "red" hose from the PRVR is going. Also where do I get a plug with 2 nipples to run that hose correctly because mine currently looks like this.

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Also on the driver side behind the strut tower there is this plug

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Should this have a hose on it and if so what should it be going too? It currently seems to be dumping exhaust, or just outside air but to the speed of the engine. I have done as much research as I can on this, but figure some of you might know better than me. Thanks