Thread:TheGoldenPatrik1/@comment-30201944-20180501024109/@comment-31984232-20180508022232

One of the two pages I linked to in my comment for that:
 * Your Common JS (To Import on This Wiki Only)
 * Your Global JS (To Import on ALL Communities, but you can only use it if you are Content Mod +)

I recommend Global. Just makes life easier if you don't want to copy and paste on every wiki :P