One rig for different Models

Hello everyone =)

I however unfortunately found nothing details already longer searched for the topic.
I work with Maya and export for Unity in FBX.
at present I have 2 files

Soldier1.FBX
SoldierNPC.FBX

In both the same skeleton is present.

Which attitudes do I have to make, so that they share the same skeleton?

But how do i create such rig?

This isn’t something I’ve done, but I think all you have to do is make sure you have the same number of bones, named and connected in the same way, and export your models and animations separately.