I agree, get the new panel.
On the pic the fuse is on the left and the wire goes from the fuse to the left side of the switch. Note the left side of the switch has the same 2 connections and how the wires are attached. The right side of the switch is for the positive output to the load (gps, light, etc).
Lots of panels do not have a place for the grounds and it isn't necessary anyway as you're only switching the positive. Blue Seas 360 panels do not have ground connections as one example. They usa a separate connecting point, usually a small bus or terminal block.
Living aboard in Victoria Harbour