primus omnifuel priming pad query

[xtdrew]

Hi, I've got a new priming pad for an old model primus omnifuel stove but I can't figure out whether the pad goes above or below the circlip? Any experts available?
Drew

[Dowser]

Any of these diagrams any use:

[xtdrew]

Brilliant. Thanks for that. The second diagram is for my stove and it shows the pad fitted above the circlip. I'll fit it tomorrow and hopefully generate a lot less soot!