The White Plastic “cable Box” on the Mac pro has a spare USB cable built in...
Can I use IT to connect the Pro to the IMAC?
Just to add, I wouldn’t rely on the browser password managers...try Last Pass or 1Password (or Apple Keychain?) to fill in your browser passwords for you.
Can I use IT to connect the Pro to the IMAC?
Apparently not. Instructions for Migration Assistant:
Connect both computers to the same local Wi-Fi or Ethernet network.
Or connect both computers directly using a Thunderbolt, FireWire, or Ethernet cable.