Help Fixing Sliding Closet Door

[Scott Weaner]

Today I got a call about a sliding closet door that was basically falling down. Whoever originally installed it did a typical piss-poor job, but we were able to fix the issue. while fixing it the bottom of 1 door came off the track and we were not able to get it back on. It is not a typical wheel-type mechanism, but just a slider that keeps the door in place below. I will attach a picture below. There are 2 little tabs that go into the track, but I could not figure out how to get them back in. I could find no videos or pictures of this mechanism.

Any help would be appreciated