What is this ribbon cable for on the IR tray (of S3CA)

I am modifying a Sony S3CA which is a special version of the a7sii with no screen or record limit and a few other tricks. I noticed this ribbon cable coming from what appears to be the IR filter tray, any idea what that would be for? It has two contacts on the cable.

It’s the tiny cable in the bottom left of the frontal image:

Thanks