I wanted to have my 2 screw terminal blocks connected from the front similar to Wago connector but couldn't find any suitable holder so I whipped this up.

To assemble, you'll need to remove all the screw, then screw it back in after inserting the block into this holder. Those screw will help hold the whole block without it falling out.

It's a relatively simple design so I've included Fusion360 file if you want to customize it for your need.