Relays, plugs and sockets in the vicinity of the battery

[eng622]

My Giff is a 97 500 and I can see only two relays plugged into black sockets, so is this correct or do I have some missing/can't find. I ask because I have a number of unnocupied sockets/plugs. These are:-
2 - yellow sockets
1 - black with green end (larger than other sockets)
1 - white plug with 3 round terminals

Any help on whether I have something missing or what they are for appreciated

[dnb]

They're for the aircon you haven't got and one is a diagnostics socket.

The engine and ECU loom is taken straight from the early 90's Range Rover parts bin - very few mods (if any!) were made to it.