They are globals, defined in the script that Fair Strides posted:
string stringGLOB_4 = "g_w_blstrrfl001";
string stringGLOB_5 = "g_i_adrnaline003";
string stringGLOB_6 = "";
string stringGLOB_7 = "g_w_blstrpstl001";
string stringGLOB_8 = "g_i_adrnaline002";
string stringGLOB_9 = "g_i_implant101";
string stringGLOB_10 = "g_w_blstrpstl001";
string stringGLOB_11 = "g_i_secspike01";
string stringGLOB_12 = "g_i_progspike01";
string stringGLOB_13 = "end_locker01";
As Fair Strides pointed out, stringGLOB_13 is the starting footlocker. Referring to the globals list, the tag is end_locker01. If you look in the placeables list for end_m01aa_s.rim, you'll see a number of footlocker UTPs. If you check the tags, you'll see the one you want is footlker001.utp. To do what you want, you'd have to delete the clothing item from the footlocker's inventory by editing its UTP, then edit the script Fair Strides posted to spawn the particular items you want for each class. Then you'd need to package it up as a MOD file.