You can at least fit the short one now and order a longer one so you don't have to run around LBSs looking for one in stock when you do have a working one at home
True, but I definitely don't want to remove cranks and fish out a junction box twice!
We found a 700mm one in Shebuya. That should be good so I've sent the troublemaker to go get it. God knows if we're gonna be able to put it all back together.
You can at least fit the short one now and order a longer one so you don't have to run around LBSs looking for one in stock when you do have a working one at home