iirc its not just a case of removing the hose from the lever and threading through. The hose needs to be cut and then a new hosebarb and olive need to be used (it is maybe possible to re-use the hosebard and olive but not really worth it for a couple of quid and they do come with the bleed kit iirc). Then, when its all back together, you need to bleed it. All a bit of a PITA.
I've done it a couple of times in the process of building up my O-Os; tbh, if I was building up a frame again, I'd just ziptie the hose instead.