[GGCO]

Love the idea of some kind of track, and it looks to me like it is some sort of field piece.

The holes in the yellow plastic part suggest that it could be a part of a larger mechanism. Since there is a curve in the yellow plastic, maybe it helps the balls travel down the track (if that is what it really is).

The part looks like it could attach to other parts just like it - the back poles are the right diameter to have the front smaller poles fit inside of them. Once again, this makes me think of a track.

If it is a docking station where two robots can attach to each other, then it is only one small piece because that would DEFINITELY break under the intense environment it would be subject to.