Nasaman

I was trying to edit the M2KC_10T file and bring my changes into the game. Now the other files M2KC_1T/2T/6T... have the keywords ext1, ext2, ext6... in the description .lua I tried using ext10 and some variants of it as a keyword but it didn't work. Does anyone know what the keyword for all the texture files or at least for the M2KC_10T is?