Want to move my TTN Gateway to V3

I’m also struggling with the migration of The Things Kikstarter Gateway.

I can see the GW on the legacy V2 console, so the connection looks okay.

After reading many articles, blog entries and web pages and watching this video I got the impression that the migration will be really simple, just “redirecting” the traffic to the V3 stack by replacing the address of the cluster.
However, I’m not quite sure how to do that as the device configuration page doesn’t have a “cluster server address” input filed (only an account server URL field).

Should I use the CLI tool (ttn-lw-migrate)? If so, is there a guide availbale somewhere?

Can someone point me to the right direction?

Thanks in advance.Screenshot 2021-06-04 at 21.54.15