How to add levels/prestige to my offline bot warfare server?

I would like to make the max level 65 and have 56-65 be the respective prestige badges.

I’ve tried googling what to do and haven’t found much. From what I’ve seen it looks like I need to edit a couple .csv files (ranktable.csv and rankicontable.csv). But I don’t have those anywhere in my server and I’m a noob so I don’t even know if just creating those in some folder would even work.

If anyone could give me some help id really appreciate it. Thanks.