The Boer Mauser carbine was issue with the sling on the left. In this arrangement, it is quite easy to bruise your cheek when shooting. But unlike the Jungle Carbine, both the front and rear sling attachments can be taken off and switched, putting the sling on the right. If you look at photos taken of burghers in the field, you'll see that most carbines had their slings moved over to the right.