I've noticed that you don't have details for Mzimude Pass on your lists, etc. Well here are a few for the sake of completeness
It's not a rock pass, just steep grassy slopes without any trail. The pass forks about 2/3rds of the way up - we took the South fork which was steep with a narrow sliver of grass allowing access through the upper rock bands to get to the escarpment. In hindsight, it appears that the North fork is the logical way of ascent, a little more rocky but it still looked ok from above. For both options, simply follow the course of the river all the way up (no waterfalls or similar obstructions).
Mzimude Cave is found about 50m down the North fork from the top of the pass, in the Northern wall of the pass. There is a little grassy ramp to be ascended to get access to the cave ledge (I think there is a cairn). The cave is roomy and well sheltered. Also nicely tucked away like Fangs which helps with the safety aspect.
I don't think this pass is used very often, mainly due to the difficulty of access to the bottom. As you know, many of the "trails" marked on the Southern Berg maps are non-existent. However, I find that the remoteness and adventurous aspect of making your own way through the little berg give you a unique berg experience in the south which is very appealing.
We made our way to the bottom of the pass from Bushman's Cave - an interesting approach and well worth it, although not the most direct (the trail marked on the map is non-existent).