Motion tracking location within OBJ file (UNITY)

Hello,

I am currently working on using UNITY to model surgical procedures using a magnetic position sensor by Polhemus. The Unity script written by the company has everything working as it should, the only question I have is, the tracker is set to the CENTER of the MESH which I updated for our application to simulate the the surgery we are doing. However I want the tracker to be in an offset, not the center of the mesh, but I am not able to do that.

To be exact, the sensor will be attached to the side of the jaw in reality and I just want the same to be true inside Unity.

Please see image for description, please also ask any questions if I'm not clear. Thanks for reading!

Image: https://drive.google.com/file/d/1-aWwR60nNaxQEn68moH4D9XYmgTArHll/view?usp=sharing

Best,
Adam