Oh Oh I'm back on this thread!
Between the Haynes manual and online pics I've got a bit mixed up. Apologies for length of text, I'm keen to get everything wired up correctly.
2e3 whos who by
Paul_Barr, on Flickr
Using your image & Haynes (Bentley seemed very different) and 5 wires for engine bay from black box would I be correct in assuming;
Black wire (has 12V with ignition at position 1) to either spade on thermo switch / Lilac & Black wire to other spade on thermo switch (now has 12V with ignition at position one and assume cuts off when temp is reached) - spur off black wire to Idle Cut Off to give 12V with ignition at position 1.
Red wire to Choke Heater, Manifold Heater and Throttle Body Heater (this is from Haynes if I'm reading it correctly and differs slightly from your pic). I have no power to red wire at present, should this have 12V with ignition at position 1 or only when engine is running - I understand it is linked to the Lilac & Black wire via the relay in the black box.
0.3 Bar pressure switch under push rods from blue/black wire - this has 12V with ignition at position 1
Coolant temp switch (old style cooling system) from yellow/red wire - with ignition at position 1
Not sure if this is correct as Haynes looks slightly different,