Depends on how you want to connect the motor to the wiring harness. Some options are soldering the wires to the harness, using a purchased terminal block, using RJ45 or other crimp or punch-down connectors, or printing the solderless mounts, which basically have a built-in terminal block. I use the solderless and I think it’s very easy to hook up and also to change if needed. When I recently created my clip on z tower connection mount for RJ45 and XLR connections, I also included solderless mounts for the versatility and ability to hook things up quickly.
So anyway, if you already know that you’re going to hook up the steppers with one of the other methods, you don’t need the solderless, but if you don’t already have the connections planned, I recommend the solderless.
Just my .02,