Noob, please avoid double posting, as it is against the forum rules. You can review our forum rules here. Thank you.
Use the Edit button to add extra information to your last post instead of double posting.
I would say it'd be this:
<random position region: 2 start>to tell it to place the events randomly on region 2, and once they're initially placed, to remember where they were and put them in the same spot every time you return to that map.
Note the comment about the switch. You will need to adjust the script and specify a switch id that you haven't used for anything else (because you don't want it to be accidentally turned on). Then in your switches, name that switch to make sure you don't use it for something else later.
If you have more questions about how to use the script, you should post them in the topic for that script, not here. Only come back here if you find the script doesn't do what you need (and you've got confirmation from the author that it doesn't do what you need).