@Josh sdfcli importobjects -scriptid customscript_myscript -type scheduledscript -destinationfolder /Objects $SB_INFO
This commands works for me, destinationfolder path is relative, to not have to input passwords, I did this command before:
sdfcli issuetoken $SB_INFO
Where SB_INFO is an env variable that defines -account, -email, -role and -url. You have to make sure your role has needed permissions (you can search the suiteanswers post to set it up)