I need help with StarterCharacters

[bruno6690 (9mmdose)]

So, i’m recreating this one “Madness Combat” Chracter in studio, however i have a problem when it comes to the torso.
I welded all the parts into a single part, which is also welded to the torso itself, however, the torso and all the parts don’t corespond to the animations of the torso, as demonstrated in the video down below.

https://streamable.com/xfitlb

So with that said, i must know: Where should you weld the parts/models/unions to? And which part should you weld to the humanoid’s torso?

[budmomo (Evangelia)]

I weld the torso to the HRP and then limbs to the torso and then corosponding decorations to the limbs their suppose to be attached too