Another thing toc consider is that using the first mentioned power supply (which I have) is not a reversing type. You could add 2 relays and make it reversing or you could find a poer supply capable of reversing the motor direction. Of course, you don't need reverse, but it is handy.

Here is a reversing power supply on ebay. The 2 black cubes on the unit are the reversing relays.
https://www.ebay.com/itm/371749056306

You could always spend more money and get a Hbridge unit that reverses without relays.

I don't see how they build this stuff so cheap.