Hey man I have a doubt
do you know what's the purpose for kits like kit_12_20_0, kit 12_40_0, kit_12_60_0... and the same with kit1 and kit2 folder
They are "special" kits for teams who have betting/gambling/alcohol/tobacco sponsors.
For example, in some countries it is not allowed to have betting sponsors. So if in the language select screen, you choose a country where betting sponsors are not allowed and you have a team with a betting sponsor, then FIFA will not load the default kit (kit_xx_0_0), but instead it will load the kit for the team without the betting sponsor (kit_xx_20_0).
For example, Leganes has a betting sponsor on their shirt in real life. If you play FIFA and you select a language/country where it is allowed to have betting sponsors (Spain/England), FIFA will load the default kit.
But if you select a language/country where betting sponsors are not allowed (for example The Netherlands), then FIFA will load the "special" kit and Leganes will have their kit without the sponsor.