"addnode=IP:port" can be put in the config file and it will be loaded every time the wallet is started.
If you want to add a node from inside the console you have to run command like this:
addnode ip:port add
In other words, command addnode, followed by the ip (with or without port number), followed by the flag add

You can see the difference clearly in example below:
Config file:      addnode=31.148.219.50
Console:         addnode 31.148.219.50 add

Any information on solo Mining on this coin? there is none at all.