Start/stop GL-X750's wireguard client from shell

Technical Support for Routers
1

I would like to control the built-in wireguard client (which works great) from the shell. I’ve seen snippets of code but none seems to work
Is there a definative guide on how to connect/disconnect a pre-exisiting client?

2

/etc/init.d/wireguard stop

/etc/init.d/wireguard restart

3

This results in the following code containing

uci: Entry not found
.....
Cannot find device "wg0"
4

the message means wireguard is not started.

5

Ok - This wireguard configuration works from the gui but it seems that this CLI approach doesn’t work… Is there another route?