If you use a System Password .. parameters: /s /p=your password /r
Use Advanced Search to define where the bios firmware is needed. See example.
Really a simple fast way to upgrade the BIOS. Just ran it on 94 desktop computers at one time. Best thing is to reboot computers from a reboot script or by hand then send it. Computer does need to reboot. The one bad thing is the C:\ProgramData\Dell\KACE\kbots_cache\ the .xml file is on the computer and your password can be read. For that I just added a task to delete the file.