Today I got my clutch kit and fly wheel replaced t

hem drove it around an felt the brakes was a little spongy. Drove it home and started to flush the brakes and I saw this piece loose can't you guys what piece is this? Starting to diy matience and repair this car. Sorry new to this diy.

The piece hanging in the middle.

 

That's your swaybar endlink. See the "ball" down below it? That's where it connects. Doesn't affect brakes at all, just limits body roll in the turns.