For this mod, You will need a USB back panel cable. I cut the Dupont connector and soldered the USB-A plug. I am using an enc28j60 module with an ethernet socket that is sticking over PCB by 2mm. You will also need to print 4 spacers (included). You need four M2.5 x 16 bolts and 4 nuts. Use the template (also included) to drill four holes. You can hold it in place with some M3 screws.
I took back panel model from: https://www.thingiverse.com/thing:5259776
The author hasn't provided the model origin yet.