That cable you linked to is 12/3 mains wiring, not gonna work for DIY pedal power cables. The site says those ends work with their "Tightrope" cable (
https://lavacable.com/collections/bulk- ... rope-cable), which is a solid core cable. It may work fine, I honestly don't know, but I'm still wary of solderless cables and solid core wire isn't my first choice for cables that get moved around a lot. I do have some old RCA cables that are solid core and they have held up well over the years, but they don't get moved around and plugged in and out a whole lot like my pedalboards do, lol.
I want to say I've seen somewhere you can buy pre-terminated lengths of cable, and if the price is right and you can get one cable that is long enough to cut and make 2, then you might get a little more bang for your buck getting something like that and some of those ends whosimarykelly linked to.