How can I mend my Brother KX395 carriage?

a small piece of plastic broke in my Brother KX395 carriage, I took the 4 screws out and have put the pieces back together except a piece of metal with a v shape in the middle, can't find out where it goes. do you have any pictures of the inside of this carriage.
Thank you
Valerie Cosentino, November 2022


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