What is this part?
 

Hello Everyone,

I was taking apart my rear cowl to fill my rear brake fluid and I was also changing my air filter, also had my gas tank removed to check the drain lines. I have a 2003 Honda CBR 600RR.

This foam part appeared out of nowhere and I'm not sure where it belongs. Do any of you know where it goes?

I think it has something to do with my rear cowl and the seat compartment under the passenger seat but I'm not sure.

Any help is appreciated, thanks!!!!!