Unfortunately as you said -the guitar in question isn't in the list, but I never expected the diagrams (even for earlier models) to bear absolutely no resemblance to the multicoloured spaghetti - that passess for early Jem electrics (how many ways are there to wire a guitar for heavens sake??).
Ultimately it is on of them 50/50 situations, so I guess it can't really do much harm if I wire the plug socket wrongly first time around (I hope).