There are many models of these.
And generally they are a pain if removed.
I would unscrew it almost to the end to have the maximum freedom of movement
Put the inner part inside.
And pull it to force the inner part to wrap the hose, and make contact to the tube, and screw.
When nothing work, disassembling the BB to have access is generally the only option.
Surgical pliers you can lock on is my life saving tool in general for this.
Eventually managed to get it in, like you suggested, unscrew to the max as possible but remain connected. One of my hoses was also too wide for the guide hole, so trimmed (burnt) the middle plastic section to allow more space. Even doing this, it was a huge PIA to get push it back into the BB.