No fluid at rear brakes

i just founf this pic. and it shows thr front of MC hooks to the front bottom of prop valve??? Are they wrong or am I? I'm going to try and blow out the lines with an air compressor and make sure the prop valve is getting fluid. I;ll post an update it the morning.

On a side note, I just put a rear disk kit from summit on. the instructions didn't mention having to change out the MC or prop valve so I assume its compatible but I just want to make sure.