Are you referring to the "hoses" that run along the inside front panels where the fenders attach to the bug? In other words, the trunk? As far as I know there is only one way, the hard way.
First off, only replace them with brand new hoses. Don't even try to attempt replacing them with used hoses, that would be a royal pain. The hoses are mainly just twisted on the connector tubes. Also you will find metal bands that wrap around the hoses to help keep them in place. I have replaced them on two bugs and the only way that I know is to just become a one armed bandit. There is just not enough room to use two hands down there. Just feel your way as you go. IF you use patience you should be fine.
Hope this helped,
Larry 🙂
In Kentucky
Enjoy life to the fullest - in a VINTAGE VW