The Co-Op wire was 20ga and not real flexible. So I'm guessing thicker stranded cores and might work ok with the DNA40. If were me I'd give it a try since it's all soldered up and ready

Cutting it out and replacing wires later would of course suck but it's doable ... My guess is that it will work fine.
That said... I got extra of that 20ga wire and haven't used it for anything other than giving it away. I simply didn't like the feel of the wire and shielding, most likely because I'm so used to working with noodle soft high stranded silicone shielded type wire.