[GR2] Positioning an object added with "Attach"

[Kaiser 1245]

Hi all. From the source code, I attach a different object to an NPC or another object as ATTACH_DATA, but the connected object appears in the default position.
For example; Let's say I tie a sword to an NPC's waist. However, the sword is displayed stationary and sideways. In this case, is there any way I can rotate this sword clockwise? (This was just an example, all I want to do is rotate these connected objects clockwise..)

 

I would be glad if you could help me, good work.