Hello,
ERC20 tokens are not supported by this adapter. You can definitely use it to connect to Litecoin and similar wallets.
The csv file contains coin definitions, therefore there are no server specs in there, only details about the coins.
Once you enter a coin definition, an adapter is shown in your WordPress admin panel.
Then, you can setup the details to connect to your wallet via the coin adapter settings in your admin panel.
Hope this is a bit clearer. Please do let me know if you have further questions.
kind regards