what is this for please?

[tee3peeo]

Does anyone know what this is/does please? It's the yellow ringed electrical connector attached to the alternator and has 3 pins pointing upwards. At the moment it just seems to be there to catch dirt and oil.

many thanks
zeb

1985 1.9 DG 14" syncro

[silverbullet]

Redundant diagnostic plug for ignition timing.

[tee3peeo]

many thanks silverbullet - mystery solved