The good news is you won't have to wait much longer. The E train entrance will open on Dec. 19, providing a direct link from PATH to the E train, said a Port Authority spokesman.
...
Port Authority officials corrected their original directions to access the passageway to the E Train, where they said passengers would have to head toward 4 World Trade Center.From the PATH, passengers would walk up the steps to the Oculus and then take an escalator to the second level. The passageway to the E is in the northeast corner, near Tower 2, officials said.
http://www.nj.com/traffic/index.ssf/2016/12/when_will_the_e_train_be_connected_to_wtc_hub.html
Please note that this is the original 
connection, not the new ADA-compliant entrance that will connect directly to 2WTC (which might not open until the 
returns, anyway).
It's been many years since this connection was possible. I actually had the experience of using the original connection back in 2008 when I first moved to NYC:
