Just started engine bay clean up and coolant "refresh".

1994 XJS Convertible 6.0 V12.

Left hand side of bay 4 blue Hella relays....5th "space" is the red connector, seen in photo, marked "Rists".....black "box" to the right of this is the headlight logic control.

Am I missing something here? Or is this for a relay/diode pack for some feature not offered in the US?

My shop manual is is Denver at the moment, so I can not consult it at the moment.

Thanks,

Rob.
2006 X Type Wagon.
1994 XJS Convertible 6.0 V12.
1987 XJ6 DD.