CLKOUT2 and GPIO3_20

what is the intent behind connecting CLKOUT2 (schematics p.3) to GPIO3_20 (p.4)? From other posts I understand that the CLKOUT2 is 32kHz by default, but it can be set in SW to other frequencies, though with some difficulty. So why is it fed to GPIO3_20? What applications use this clock?

I am asking because I intend to use BBB for our research application. I want to make sure I am not going to break up something important by disconnecting these pins.

Thank you – Wojtek

It was a way to get additional functionality to the expansion connector. Use one or the other as needed. Not both.