Want to add bed leveler to CR10-s

Hi, I have a reality CR 10 S printer that I’ve got back out and have set up. I want to know if I can add the bed leveling kit.

I have a V2.1 main board and firmware is at 1.1.6

I have not been able to connect it via usb to update firmware. I need to try a different cable I think

Please let me know so I don’t order something I can’t use