what line go's where?

I must rant. "Not ever" = NEVER ask a question about your car without stating the year and other relevant particulars. This is a perfect example where it matters, and why the answer in post #2 is wrong for the OP. The item in the right of post #1 photo is a "distribution block w/ imbalance switch". The "proportioning valve" is the part to the left. These later became one part, the more common "combination valve", which also includes a "front metering valve".