Ok. Those pics helped a bit. Can now see that you have a different size hose ( the one zip tied to the felxible conduit) than I have seen going to your cruise control servo.
It looks like you have 6 connected hoses (can't see the back very well in any photos) which is correct, and that clear hose segment. I would first ditch that hose segment for a proper cap.
Next I would see if any of the hard hoses are connected in a stressed position ( I expect 3 of these. 1 to the FPR routes along the passenger side fuel injectors, 1 that branches to the vacuum reservoir and air cleaner and HVAC, 1 that loops around under the upper intake manifold to the egr which is mounted on the drivers).
Check that large hose at the top left,
This is good is good advice, seeing as that hose is very dirty. That hose goes to your transmission. If you have a vacuum leak (at or after the vacuum tree)so large that it is effecting idle speed it is not likely due to a partially leaking hard line, it is likely one of the larger hoses going to the trans, brake booster, or cruise control servo (listed as speed control in the linked vacuum diagram). The hard line leaks are normally noticed when accellerating.
The base of the tree is also very dirty. If the whole thing isn't sealing, that could be your trouble. But it doesn't look to me like extra treads are exposed.
just to state "Assuming this is actually a vacuum leak": You could try using smoke to find the leak/s, or test each hose segment individually with a vacuum tester ( tedious, but most reliable method to rule out individual potential causes. can break old brittle hard hose though ).
Uh.... first pic, is the hose going to you PCV (the thing directly below the tree, in the valve cover) split?
Reviewing your threads, if you just bought this in ≈october, have you checked to see if there is ratpoocake where the air filter should be? Just warrants mention as you seem to have acquired a TLC XLT.
Also, as you've not mentioned any codes yet, when you start your car, does the MIL/CEL initally illuminate like it should?