Ok, to provide further clarification to Shelly's question and to resolve my own confusion on this subject I spent some time reviewing my ULN-8 documentation and found no unbalanced cable diagram for the ULN-8. Dan was correct in that his diagram for the ULN-2 connectors is what MH recommends, but that diagram is in the ULN-2 pdf only. Since I found the recommendation of using a TRS connector in a unblanced cable unusual I sent Metric Halo tech support an email and this is their response
"If you are connecting to a TS or RCA, you connect Tip to Center Wire Sleeve to shield And don't connect Ring to anything.
We generally find that you will get less distortion if you use TRS and leave the ring unconnected (not shorted to ground). It will still work if you use a TS, but the distortion will be higher."
So Shelly, TS and RCA connectors on a ULN-2 cable will work, TRS (with a floating center ring) and RCA are preferred per MH. As far as I can tell a TRS with a unconnected floating center ring is not readily available so you may need to custom order it. The second link I provided does a nice job in custom cable configuring.