How to add new clothes?

[Bran]

hey guys, i'm literally stuck on adding new clothes, i literally know how to add EVERYTHING ELSE except clothing lmao... i have NO idea where to put the section of the clothing piece in figuremap and stuff, the clothing just doesn't show up or the character just ends up white? i even followed a tutorial but i think it'd best if someone just shows me how to do it considering i learn from visual learning and not reading​

 
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[Joe]

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[Bran]

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tried it, can't do it it won't work for me

 

[Joe]

tried it, can't do it it won't work for me

Followed the same tutorial multiple times, works for me.