Just apply and teak is fastest for a single pose. General procedure: make a pose dial to match, as close as you can, the pose of the source figure. In matching, angles are more important than location. Do not forget to switch IK off.

Note poses will usually need tweaking if certain end points for hands are to be met, like left hand holding right wrist,  or with couple poses. The initial approximation can have only a certain accuracy and errors integrate with every joint. Also the length of limbs may be different between target and source.

When  successful, make an injection of the pose dial for re-use and share it here in freestuff.