The actuator, (dashpot?), the thing that actuates the secondary throttle plates. What nipple does the vac line run to and further more, does it matter which one it runs to?

 

i got rid of all that jazz, while you're at it get rid of the water thermosensor. one less thing that can brake.

 

Its the vac line that comes from the whiteish plastic piece that sticks out of your manifold, on the firewall side. it has 2 places for vac line, the one closest to the front of the car does to your secondary actuator thing, the one closest to the firewall goes to the side of your (i think) upper manifold, down by where the lower and upper bolt together. And it kinda matters cus i think theres some kinda temp sensor in that plastic thing, but you could technically run them offa straight vacume, all it does is open em up when theirs no vacume, aka at wot, works kinda slow though, getting rid of the second set of plates is a good idea