Another new guy question, diagnosing a rough running engine Options

[A Havland]

Hello all. Finally saved up enough to get a 914. It's a 1974 2.0 in silver. I am working through a few issues. When I first got the car home it was hard to start so I did a valve adjustment and now it starts right up. The next hiccup is the engine runs very rough just above idle until it is completely warmed up. I checked the AAR valve and it seems to open when the car is cold. I took out the air sensor and it passed the olms and vacuum test. Replaced the plugs but the old ones looked good. Light grey in color. I could use some help if anyone knows where the two wires in the white connector goes. This is all new to me and the learning curve is steep (at least in the beginning). Any help would be appreciated. Thanks.

[914sgofast2]

The vacuum advance hose is clearly missing from the nipple on the distributor. There needs to be a vacuum hose from the nipple on the vacuum advance diaphragm connecting to a nipple on the intake plenum. Without it, you car will run, but with "flat spots" where it seems to lose power briefly.
I think others have answered your question about the electrical connector that has come off its position.

[Dave_Darling]

There needs to be a vacuum hose from the nipple on the vacuum advance diaphragm connecting to a nipple on the intake plenum.

No.

The advance hose gets hooked to a port on the throttle body that gets a "high vacuum" when the throttle valve is just barely open. This is "ported vacuum", and it drops when the throttle valve is open more than a crack.

The retard hose gets hooked to a port on the throttle body that sees something relatively close to, but not identical to, the vacuum in the manifold (AKA plenum).

Most of the 74+ cars had throttle bodies with only one fitting, that for the vacuum retard. The dashpots on the distributor were the same, with two ports, probably because it was cheaper than tracking two different versions of the part when building the car in the first place.

--DD