If you need to attach to a wifi and don't have a UI yet.
nmcli device wifi list
sudo nmcli device wifi connect SSID_or_BSSID password password
Install and start the ssh server to accept connections.
sudo pacman -S openssh
sudo systemctl enable sshd
sudo systemctl start sshd
Add the public ssh key for the authorized client.
mkdir -p ~/.ssh
chmod 700 ~/.ssh
curl -Lo ~/.ssh/authorized_keys https://raw.githubusercontent.com/OysterRiverOverdrive/infra-management/main/authorized_keys
chmod 600 ~/.ssh/authorized_keys