Ahh, thanks for the clarification on the USB-C issue. I guess I won’t have to worry about that with my 6610 since after looking at the manual I see that the serial console ports are rj45 and on the back with the 48 port switch.I think the issue with the cables were on 7k series devices that had USB-C form factor ports for console access that didn't use standard USB-C pinouts. I believe it would try and negotiate power over some of the pins and fry something.
As far as I know, any router serial cable with an RJ45 end for the switch and labeled as Cisco compatible will work for a 6k device. But I don't have a 6610 specifically, so I can't 100% confirm. I use this one with a 6450.
For some reason I thought that the serial console cable plugged into a micro usb on the switch and then you would use the rj45 connector on the PC side. I think I just confused myself while trying to digest all of the info over the last few months.