Clock Pins for Arria 10 SoC Development Kit

What you reference is a differential clock on those 2 clock pins, so that might not be what you want.

I'm presuming it's this kit but the pin numbers you mention don't match up with your description of them according to the documentation: https://www.intel.com/content/www/us/en/programmable/products/boards_and_kits/dev-kits/altera/arria-10-soc-development-kit.html

Is that the kit you're using?