Unfortunately no, I have not put together a guide on how to do ssh tunneling to a full node wallet.
To clarify, this is recommended practice from the Bitcoin developers and is only needed when the wallet runs on a different server than your WordPress installation. If they are both on the same machine, tunneling is not needed.
I will try to add step-by-step instructions in the documentation when time permits. In the meantime, you could have a look at the following instructions I found with a Google search:
https://gist.github.com/EnigmaCurry/bdd9fd28d7a73fe52eb4
P.S. In the future can you please open a new thread for each distinct request? This helps keep the forums clean for people who look for similar info in the future. Thanks.