lijaneja,
last year I went along this ridge and would like to pass on a couple of orientation tips.
This descent down the gully I'd rate as the most awkward part of the route, more than the horse. At its top there's an unmistakable peg through which you thread the rope for abseil. Harness absolutely necessary.
If you look at the video
https://www.youtube.com/watch?v=2sXI9CY7YS8 second 0:51 is the branch-off for this gully, unmistakable.
I'd add that Mihelič in Slovenske stene writes that you can descend from Rinka to the lowest point of the ridge directly down the scree and no need to divert into this gully. I don't know if that's easier or harder variant than the one through the gully.
When you return to the scree, at the point in the video
https://www.youtube.com/watch?v=OZUw6zGzRZw at second 7:01 you can bypass the spot also on the left side, easier.
The horse can be crossed by riding or by descending prb two meters into the right flank as shown in the video shared by zokipoki.
LP