Where does this piece go?

Block Image

Block Image

My unit is a 2.0-200 but looks very similar to the 400. It fell out when I popped out the pod basket for cleaning. I can’t figure out where it goes. Ironically the Keurig still works without it. Very strange. Thanks for your help.

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 0
crwdns2892346:0crwdne2892346:0