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I'm looking for a P cast into the throttle body to hook up a boost gauge but not having any luck. I found a ton of threads on the subject and that seems to be the best place to T into. I'm pretty sure it's one of the lines on the top passenger side but I'm not sure if it's the red striped or green striped one. Maybe I'm looking in the wrong place or the markings wore off, any advice is appreciated.

Put a T fitting on the FPR line.

Yep

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93 Mitsubishi Expo LRV 1.8/manual
95 Eagle Summit DL Coupe 1.5/manual
01 Mitsubishi Mirage ES Sedan 1.8/manual

Thanks for the help works perfect.

Just remember to zip tie that line and make sure there are no holes in it. It is the best spot to grab boost from, but, it also leans out the motor really bad if it ever starts leaking or pops off. Just posting this up for anyone tapping in for the first time.

Thanks for the info I remember reading about the lean condition in another thread that is one of the reasons I was looking for the port marked P or an alternate source. I am planning on getting a wideband soon but until then is there any signs of a leak to watch for besides the obvious hissing?

No, but a boost leak will cause running rich under boost, and cause a vacuum leak under low rpm conditions.
Best to get good new silicone or proper reinforced rubber vacuum hose in their for the install from the very beginning.
Do not trust the original vacuum lines for that section, especially when tapping in.
Then add the zip ties to the fittings. Oh, a metal T section would probably be best as I have comprimised for years
using a one size fits all T section made of plastic - god I'm behind on the reliability upgrading again! Drats.