Indeed and good trick to know cn90.
Making progress with PB treatment at the junction - day 5. The suggestion to cut off the rubber hose close enough to fit a socket (14mm) sounds reasonable.
Since the passenger's side hex at either connector is deformed a little, as Tonyx points out -- see pix above -- should it be filed a little and straightened for socket to fit firmly?
The driver's side is untouched, so, I'll start with this side.