I mounted that ground to my intake manifold. I don't think it really matters too much where you mount it as long as it's a good ground.
the first vacuum pipe is I believe for the charcoal canister. That should run to the solenoid you're pointing at, the purge control solenoid.
which then connects to the vacuum line closest to the throttle body.
So looking at the solenoid, the vacuum line attached to the solenoid still should go to the intake manifold
the one that has no vacuum line would go to the charcoal canister.
someone correct me if I'm wrong, getting rusty on my vacuum line routing without owning a KL...