'95 Lincoln Vacuum Problem?

I had a long vacuum hose pop off somewhere on my motor that starts at the backside of the motor. I don't know if it goes left or right from there, but it is definitely the longest hose of all the ones coming from the backside. Any ideas what vacuums originate from that location?

I've looked at a vacuum diagram for the car but it doesn't make much sense to me. And I don't want to take the car to a mechanic to fix 1 hose that popped off.

Thanks.