Paul,
The later (Mk4&5) shock absorber cover had 3 cutaways to clear the front 3 final drive mounting studs and nuts. It is also interesting to note that there is no mention in the spares book of these studs having washers under the nuts. Added to this, the depth of the cutaways may need to be altered depending on the number of adjustment shims required between the gearbox case and the final drive housing. These shock absorber covers are quite prone to damage from broken chains, etc., so it is quite possible that yours may be a repro casting supplied at some time by the LDMCC spares scheme. With all this in mind, the cutaways may need easing so that the cover fits snugly to the face of the final drive housing. The shock absorber cover is not intended to keep all the weather off the final drive - it is there to prevent trousers, fingers, etc. from being caught in the chain, and also to prevent the chain from throwing oil/grease onto anything in it's line.
Regards,
Eddie.