Voltmeter Ammeter mount for 2020

I want to measure power consumption of my printer so I buy a voltmeter ammeter from aliexpress. It's design to mount on a 2020 extrusion but could easily mount on a flat panel too (wood or acrylic).

Boom

- Mini voltmeter ammeter
https://www.aliexpress.com/item/1005004553668587.html?spm=a2g0o.productlist.0.0.b55dcbb4CuTBQy&algo_pvid=31b6c411-7d99-421b-a855-e774adf003e0&algo_exp_id=31b6c411-7d99-421b-a855-e774adf003e0-26&pdp_ext_f=%7B%22sku_id%22%3A%2212000029590723833%22%7D&pdp_npi=2%40dis%21EUR%211.39%211.25%21%21%211.79%21%21%40210318be16653647643055001ee56c%2112000029590723833%21sea&curPageLogUid=Acb1i3AQebDZ

- M3 or M5 10mm screws and nuts.