Based on what I see here--I would be very nervous about it actually working.
To clarify -- you only know that the setup is safe with it pulling the load that it is protecting.
I think the rust alone (if what I am seeing is rust) indicates that the material won't live up to its original design. Then knowing what rating was on the quick connects is another issue.
I know Roadmaster sells these. They are not one size fits all. Your weight determines them.
I have replaced all the safety cable and connectors with ones with stamped ratings, which means I had to forgo the quick connect on the jeep setup. My 2020 Jeep Wrangler is 6k lbs, and based on how a swinging vehicle could pull, all of the weight could end up on a single link.
I went with 12k lb saftey wire, and 12k lb connectors. These ratings are the stamped ratings and the working load, not the breaking point. The breaking point is what most will publish, and that number needs to be much greater (3x ) the actual working load.