We want to make the brake (and clutch) lines look as clean as possible, and get them out of the engine compartment. Here is a shot of my wife's 1500, so you can get an idea:
Well, once they have exited thru the side of the engine compartment inner fender, you then need to get them to go into the direction they need to go-- the clutch, back across the firewall (below where you don't notice it), the fronts to a T down below, and the rears down the side of the frame rail.
Because of all these bends, it is easier to put a few junctions in, otherwise there would be no possibility of getting these lines to fit.
So in the photo you illustrated, the front brake line goes to the T, the clutch line is the one with the junction, and the third line is a mock-up line to get the bends correct in the engine compartment-- it would then get a junction before heading down the frame rail.
The transitions with the junctions are necessary, we just hide them in the inner fender so we can keep things looking clean in the engine compartment.
Oh yes, the brake line guard for the lines in the inner fender come from Ford pickups.
Hope that makes things clearer.
Michael
