off the top of my head
3 short go around the dynamo
Long ones (4) I think go around the bottom of the case two each side?
Easy way to confirm is with something like a cotton bud or small blunt screwdriver, shove in the hole and put your thumb nail along it till you touch the case, will give you an idea of length needed, also softly dig about with the screwdriver to see if there's any muck in the blind holes, you can easily crack out the crankcase tightening a screw against muck in the hole