Define inputnodes in create_tbss_all

I’m trying to run tbss with create_tbss_all

from nipype.workflows.dmri.fsl import tbss
tbss_wf = tbss.create_tbss_all('tbss')

I can define two inputs:tbss_wf.inputs.inputnode.skeleton_thresh and tbss_wf.inputs.inputnode.fa_list. Is it also possible to define mask_list from the tbss_2_reg step? Or do I need to run steps 1 to 4 separately?