Digital Voltage Meter Holder for Hypercube and other 2020 frames

This is a simple little box to hold a digital voltage meter to the 2020 extrusion. The voltage modules are available for about $1 from china. Here is a link to one, I have no financial interest in it.
https://www.aliexpress.com/item/New-Style-Mini-Yellow-LED-Digital-Voltmeter-Volt-Meter-Panel-3-3-30V/32777415211.html?spm=2114.13010608.0.0.AYuvuI

These just hook up to the power supply with 2 wires, positive and negative, nothing else needed. For me it is an easy way to monitor the power su