In my newly expanded Kosmo case I have one 40W PSU which I’m going to try to have powering all four rows. Originally I had a terminal strip splitting power out to two rows, but with the expansion I decided to try replacing that with three Wago 221-415 5-position lever connectors. You can buy mounting plates for the Wago connectors but I chose to look for something I could print.
Rather to my surprise, Wago actually has a site for users to upload files for Wago-related designs. You have to register to download, though, so I passed that by. There are lots of Wago mounting plates on Thingiverse, Printables, and so on. I went with this collection:
and specifically the horizontal 3x 221-415 design.
I like it so far.