How can I also edit HustleBTC’s authentication script?

I have a JavaScript user script for making automatic bets on HustleBTC, but I don’t know where to put it or how to safely edit it to change bet parameters (bet size, interval, stop loss, etc.). I need step-by-step guidance for non-experts so I don’t break anything

what i want

How to install/run this script so it runs automatically on HustleBTC. How to modify the script to change: Bet amount Bet frequency/interval Simple stop-loss or stop-win limit

Where should I save/run the script (Tampermonkey, browser console, node script, other?) and the pros/cons of each approach.