Line rigging fix-it tip needed to rerig Revo 13 rudder keeper

[Mongo Johnson]

The rudder keeper bungee loops out of a fitting on the Revo stern. (Circled in yellow) My line has become frayed and I need to replace it.

I've got the line and would welcome and rigging tips. What's the tip to "open" or access the fitting that the stern buggee comes out of?

Do you access it by a twist of the fitting, or work at the fitting from inside from the rear hatch? I could not get my head in there.

Or, is the line just knotted inside?

I'd welcome any tips prior to poking at it.