If I understand correctly, you need to add the URL's of the lists to /etc/pihole-updatelists.conf, but I already entered them using pihole -w. Seems like double the work, for (as I understand it now) no added value...
I don't know this script/tool, but apparently this is a script to handle lists of lists (lists containing a list of URLs to the actual lists)...
Pi-hole doesn't have this function and most users won't need it.
If you doesn't use this kind of thing, you don't need this script.
There are lists of URL's to be blocked, and those lists are maintained by heroes who commit their time, so we don't have to. And then there are people who commit their time in making lists of those list, so we can go ahead with only one URL (via the script), e.g. https://v.firebog.net/hosts/lists.php?type=tick instead of all the lists listed here: https://v.firebog.net/hosts/lists.php?type=tick).