Can't seem to find where this last vacuum hose goes. It's the red hose that comes off the throttle body in the picture(not the blue one).

 

bottom nipple back side of UIM. Right in front of the nipple. there should be a check valve there too, a green and white one

 

Heres another picture of what im talking about. Is there another "bottom nipple" on the UIM where the red hose should go?

 

think I found it. Followed this picture and there was a nipple under the other side of the throttle body.

 

It goes to the double throttle dashpot that holds the secondary throttle plates closed when the engine is cold.

 

I'm pretty sure I got that line routed correctly now but I must have mixed something up because the throttle is way more responsive now which I assume is from the secondary throttle plates not staying closed. Well, I'm not really complaining

 

for future reference, here's a good picture showing the correct routing

 

I had the two lines backward, my bad