Hello U have just to drop the files in your : mods\update\x64\dlcpacks\mpclothes\dlc.rpf\x64\models\cdimages\mpclothes_male.rpf\mp_m_freemode_01_mp_m_clothes_01
and the model is install 

if u need u can change the name 
for exemple : teef_014_u.ood to teef_015_u.ood