The 69 and 70 K0s certainly have a very flimsy (if I can use that description) tail light mounting that was little improved in the K1 model. The tendency to look odd I think comes from the poorly designed rubber mounts which located the mount to the rear guard and given only 2 mounting bolts were used, proved it wasn't the most secure of fittings. Certainly a poor design which was rectified in later models. The English mounts I think were much more robust which Ash or Chris may be able to comment on. I have several used rear mudguards (fenders) which have slight depressions where the tail lights mount. Others may wish to add