Newbie Alert

Hi all,
I can't find any evidence of an alignment mark which is needed line up on the Aux or Dizzy Sprocket for my red top 2wd cossie motor. The belts been off and the distributor removed. I've looked over it everywhere and still no mark as identified in the manual. Anyone give me any pointers as to where I should be trying to aim the pointer in the sprocket.

Cheers