Engine/Gearbox fixing plates: spacers???

Hi All.
Can you please explain me where the fixing engine/gearbox fixing plates spacers go?
I understend that the first four frame/gearbox studs (from the rear ahead) dont have spacers.
Then, there are two other engine studs same lenght and widht: maybe thick spacer on drive side and thin on timing side?.
Then, bottom down, the thin stud has only a spacer to the left drive side.
The two upper engine fixing plates:
-to the up the longer stud with two thin spacer each side;
- bottom???
Please, i need your help.
Thabk you
Piero

Done.
Andover sent me the location of the spacers.
Well done Simon, thank you.
Piero