You need to add it to the servers.ini file first.
ALT+O > Connect > ServersFill in the necessary details. Make sure you put the server into a 'Group' (NonDefaultEFnet for example). Click 'Add'. You'll now see it right at the bottom in the drop down list on that screen.
Now, go to
Connect > Options > PerformClick 'Add' - the group will appear in
alphabetical order in this list. Choose it from this list and click 'Ok'. Then set the commands you want as normal
Hope this helps.
Regards,