P4 Multispectral metadata units

I am attempting to generate an orthomosaic (through Agisoft Metashape Pro) from TIFF images captured with the P4 Multispectral drone. I am attempting to align the multispec bands of the same frame in Agisoft with the “Relative Optical Center X” and “Relative Optical Center Y” values in the photos’ metadata. My problem is that these values do not include units. Does anyone know the units on these values in DJI TIFF photos? Thanks.