The following is in /usr/local/etc/devd/hardware_wallet.conf

# Coldcard MK3
notify 301 {
        match "system"          "USB";
        match "subsystem"       "DEVICE";
        match "vendor"          "0xd13e";
        match "product"         "0xcc10";
        match "type"            "ATTACH";
        action "/bin/chmod g=rw /dev/$cdev";
};