To save mappings for all selected mesh deformers
Select deformer folder and run this python script:
import maya.cmds as cmds
location = 'H:\\Numerion Dropbox\\MetaHumans\\bryan_with_clothes\\jacket_jeans_shirt_v2\\mappings'
cmds.select(hierarchy=True)
deformers = cmds.ls(sl=True, dag=True, type='CarbonMeshDeformer')
for defo in deformers:
cmds.setAttr(defo + '.filePath', location + '\\' + defo + '.nmrb', type='string')