Thanks all for the help.
Paul and Jack, the fuel tank mounts will have a space between the motor base plate and the two rails(which they go through), so if I use the six for the others these two appear wrong.
All I can work out is as Max has suggested that there are in fact eight.
If I don't place eight and go with six I will be tightening bolts and bending the base plate at two locations. Luckily I have spares from a parts setup, so I am covered however I am still a little confused by the imagery.
Thanks for the assistance!
I'll get some photos sorted.
