But if you have a nodes ip it should not be a problem to add a node (f.e.):
addnode=104.168.151.81
The .conf file is in your "user\YourUser\AppData\roaming\freicoin" folder under windows and in the .freicoin (hidden) folder in your userfolder under linux. to see the folder in your filemanager push str+h (show hidden folder and files).
Greetings Rik