Saving Old Seagulls

After a long period, I decided to complete the rebuild of my TC mk 1 Villiers ignition plate. Whilst showing a friend the parts, I dropped a tiny grub screw in the garden .Problem is, I don't even remember where it came from. Looking at the parts diagram, I can only think it's either.... no.29 ( coil lock screw ) or3a....coil end screw. Can anyone enlighten me of their use? Thanks! Red.

Figured it out! I can see now where all the screws go and what they are for. Just hope the engine works when I've finished it!