How to install SSL on different port?

Hi guys, I have been successfully installed ssl certificate on our domain. Unfortunately, it doesn't work on our domain that is using port 8000. We have a nodejs (with socket.io) app hosted there. Is anyone here know the exact steps on how to properly installed it correctly on different port. I've been searching this issue for a number of days now, none of the solution i found worked. I did some configuration on Include Editor, it looks like my changes doesn't get reflected. I also found this one, Custom Templates - EasyApache - cPanel Documentation, but i'm not sure which part should i edit or should i create a new virtual host, And i'm not sure which path should i add on the perl script?