are you calibrating it using python? if yes, its listed on the file where you get the codes, and if you are using the special calibration softwares, no need for unit Number code,
Mavic 3 cine is WM265 but it does work for WM260.
its just for calibration, for temporary use. it needs to be factory calibrated to remove the error and write the new gimbal parameters on the main board.