Needed this for a project hopefully someone else will find it useful. Holes are sized for M3 screws.

Here's a link to the exact block I used ( https://smile.amazon.com/gp/product/B091F9Y399/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1 ) I removed the banana plugs to save room and they can't handle as much power so who need them anyway.