Let's Encrypt OCSP Stapling


I found that docs for Let's Encrypt OCSP Stapling is quite hard to understand. For me is unclear two main points:

1) Should we enable OCSP Stapling in existing WordPress Listener (sounds logical for me) or we should to add new Listener (like docs indicate)?

1a) If we need to add new Listener, should we use same Let's Encrypt certificates paths like in WordPress Listener or we need to create some new certificate (What? How?)?

2) What should be (how to get it?) Let's Encrypt OCSP responder’s address? is it http://ocsp.int-x3.letsencrypt.org or something else (how to get it???)?