And from the other side of the car with the throttle linkage (and two return springs) towards the top of the picture and the choke at the bottom. This picture also shows the attachment points for the springs in the heat shield. Two holes in the bottom edge at right and left for the carb return springs (1); a tag sticking out for the choke return spring immediately to the left of the throttle operating finger (2); and two more holes either side of that (3):

View from the front of the car. The rear carb is at the top of the picture (don't be confused by the free end of the choke cable it is not attached to the choke clamp on the rear carb). The rear carb accelerator return spring located in the hole in the clamp (arrowed) the front carb is a mirror image:

The choke return spring located in a hole in the operating lever (arrowed):

The throttle return spring does not have a hole to attach to but on my car is simply hooked over the pin of the cable clamp (arrowed) where it goes through the operating finger. This makes me think that it is a later addition as the other attachment points - throttle clamps and choke operating finger - have holes specifically for the spring:

HIF: UK 78, two choke cam springs and one throttle lever spring.

No holes in the throttle cam (arrowed) or underneath it in the heat-shield flange

No holes in the choke lever (arrowed), although there is a spare hole underneath it in the heat-shield flange

Slightly clearer view of the clip holding the accelerator cable and pin to the carb operating lever. It is a folded and forked spring-clip that slides into a slot on the open end of the pin.