MP Character textures: "mods/update/x64/dlcpacks/mpimportexport/dlc.rpf/x64/models/cdimages/mpimportexport_male.rpf/mp_m_freemode_01_mp_m_importexport_01 

The files work for MP Female as well, just go to "mp_f_freemode_01" instead of "mp_m_freemode_01"

"accs_diff_000_a_uni.ytd" goes to "mods/x64/dlcpacks/patchday22ng/dlc.rpf/x64/models/cdimages/mp_m_freemode_01_mp_m_importexport_01"

For MP Female, just follow the same path, just go to "mp_f_freemode_01_mp_f_importexport_01" instead.

Juggernaut ped model textures:
Only for the Criminal Enterprises update.
Drag the file here: "mods/update/x64/dlcpacks/mpsum2/dlc.rpf/x64/models/cdimages/peds/mpsum2.rpf"

After that, save and load in.
The ped model name is "U_M_Y_Juggernaut_02" if you want to play as him.