You might consider something like this (unbolt them from the expansion plate): https://smile.amazon.com/RIITOP-Female-Connector-Adapter-Bracket/dp/B01KJPUI5W/ref=sr_1_13?dchild=1&keywords=front+side+usb+header&qid=1615925145&sr=8-13
And since those cuts look pretty rough, you could fill any voids with Sugru: