I am exploring a way to install an outdoor outlet out of my main electrical panel but I couldn’t find any visible ground bar(s) that the ground wires (in green color) can connect to, nor do I see a ground wire somewhere attached to any bars at all other than one that got attached to a bonding screw on the lower side of the panel.
Is it okay to connect the ground wire directly to the neutral bar (on the right) (it also looks like I don't have any slots available)? Just wondering whoever installed this box many years ago connected those ground wires to. Can anyone shed some light on this? Thanks.