If you put your calipers on the back, and come out of the top of each with the straight adapter in your picture, you will have the shortest cleanest run of brake hoses. With the forks fully extended at rest, the brake lines are virtually straight between the lower tree and the top of each caliper, and hug close to the tubes. I've done this.
If I'd paid more attention the brakelines could have been shorter. Also, you could bypass the junction block altogether and take both lines up to the master cylinder and have one double banjo bolt there. With a switch in the MC, you could do away with the junction block. Lots of alternatives.
I'm hoping to get a telefix fork brace like bigfootball (?), which arcs up over the tire, and hang my fender from it, cutting off the tabs that drop down on either side. The stock fork brace/fender bracket while not as stout, may be perfectly fine to do the same thing.
Just some thoughts.