object:field type MasterDetail can not specify parent object to attach field to.

[vOtto]

Hi, I'm trying to programmatically create a relationship field
sfdx shane:object:field -o assets__c --api clientassets__c -n 'clientassets' -t MasterDetail --relname=clientassets -l 255
but I have to manually specify parent object name.
API name of the parent object ex: Account, Something__c: client__c
Child relationship label? [clientassets]:
Looking at your param list, I can not find any params which relate to parent object and relation label. can you please let me know how can I achieve adding relation field without manual interaction e.i specify parent object name and relation label in command ?