Custom Cloud Variable Server
This option lets you change the cloud variable server that Dash will connect to, for example:
wss://clouddata.turbowarp.org
Inclusion of ws:// or wss:// is optional but recommended. wss://clouddata.turbowarp.org is the default cloud data server used by Dash, so this example doesn't actually change anything. Insecure ws:// servers may not work because Dash uses HTTPS.
It is not possible to use this to connect to Scratch's cloud variable server as it requires account credentials which Dash can't support.