Im not sure, I think it said SATA II, but I guess I can unhook it again and lookBlue...hmm. sounds like a standard SATA data cable.
If it's a standard SATA data cable like in a PC, then @biggen has you covered.
If it's a SATA power cable that connects to the motherboard and looks like below, then try this.
View attachment 86820
Ok, but are the power cables separate in the NVRs? Do I need a SATA cable that also sends power?Always buy SATA 3 cables. They are backwards compatible with SATAI/II anyway.