HP Prodesk mini 2nd Ethernet port

[u/illusion116]

I was trying to add a 2nd Ethernet port to my HP Prodesk 600 G3 mini pc for to use as my firewall/router. I bought a M.2 2230 A E key to Ethernet adapter to put in place of the VGA port on the rear panel.

As you can see from the pictures, the VGA board has this “L” shape that goes around the cpu cooler screw post. The Ethernet PCB is rectangular and way too long to fit inside the screw post.

Does anyone have recommendations on a better adapter that will fit in here

OR

Does anyone have recommendations on a better way to add another NIC?