Anybody recognize these parts?

[HotWheelsKid]

Anybody recognize these parts?
I am starting to dig into my Spyder GT build and going through the inventory/parts and i have these 2 plates that i cannot figure what they are. Any ideas?
I’m posting over here to try to get more eyes on the parts for identification. I’m hoping that’s ok?

https://thefactoryfiveforum.com/attachment.php?attachmentid=161725&d=1643940913

[steno]

Those are the mounting plates for the seats. Primarily the street performers type.

[HotWheelsKid]

Great. I was leaning in that direction. The instructions sheet for the seats is extremely vague with no illustrations. Not really even a mention of the plate.