I use the vacuum hose from the brake booster (the big black round thing behind the brake master cylinder) I don't know how to supply a pic, I'm kinda puter illiterate. There's only one hose going to the brake booster, a piece of 1/4'' tubing fits inside mine so I use it to siphon the SeaFoam, just a little at a time. Hope this helps, even without a pic

In your pic, there's the power steering pump, directly above it there's a whitish, square jug, that's the master cylinder, the booster is directly behind it, look on the left side of the master cyl it looks like the vacuum hose is there

You can use any vacuum hose that goes into he intake. Just be careful not to let too much fluid get sucked into the engine at once

there is a s shaped hose with it,,, pull back the air intake hose at throttle body ..install s hose so it points at the inside of throttle body and then put back on air hose ,,you can now spray ,sea foam at throttle body with air intake hose attached ,,,do not attach to any vacuum line you will more than likely only clean 2 or 3 cylinders

Does not matter which one you use as any vacuum hose will work. Just pick one that is connected to the intake or throttle body.

Don't bother. Magic chemicals don't work. As you will discover.

why are you doing this what are you trying to solve?