Hi.
Just use the fields you need, the others one will be default values.
wifi_cfg=/rw/config/NM-system-connections/home.nmconnection
echo '
[wifi]
ssid=MY_SSID_NAME
[wifi-security]
key-mgmt=wpa-psk
psk=MY_PASSWORD' | sudo tee $wifi_cfg
sudo chmod 600 $wifi_cfg