Help me with this

[Zplane]

To many hands taking my 70 satellite apart,, can someone please tell what this is for.
Have two of them. First thought battery tray, nope. Then thought radiator support, don't think so.

Maybe window stops? Somebody knows, help me out here .

 

[moper]

Looks like a window-related part. A support or rest or something. Is that rubber or plastic on the end?

 

[Zplane]

Looks like a window-related part. A support or rest or something. Is that rubber or plastic on the end?

It's rubber