Hey, my pleasure - the members here are the best, and while we didn't all get here on the same ship, we're all in the same boat.

Right under that electric choke connection is the heat tube that runs up to the choke.

On the vac tree, there's a hose on the fitting closest to that heat tube; it runs up and disappears, because it plugs in on the bottom of my air cleaner, to what I believe is the Bimetal Control Sensor. In the older pic you can see it unplugged because the air cleaner is off.

Because I know how it feels to be staring at your engine thinking, "What the...", I just shot a bunch of photos - give me a few and I'll post 'em here.