In the case of the accelerator cable lever, the shaft is splined and has a slot cut in the top used as a reference mark. As per Jim's guide, scribe or mark the lever. Getting this wrong on re-assembly can lead to engine runaway or not even starting/idling. I used white paint and a sharp blade. The nut's a 10mm and has a washer behind it - don't lose this.

Repeat this process for the fuel cut-out and fast idle (8mm nut) lever or whatever your pump has as they can vary in configuration. Interestingly, when I removed the fuel cut-out nut, washer, lever and spring I noticed the seal was wet and obviously weeping.