Get-ADComputer -LDAPFilter "(&(objectCategory=computer)(objectClass=computer)(useraccountcontrol:1.2.840.113556.1.4.803:=2))" | Move-ADObject -TargetPath "OU=disabled,DC=ad,DC=example,DC=net"
Note: This will catch all the computers currently in the OU. You'd need to limit the scope of the search to filter them out otherwise it will retry the move (I'm not sure if it'll fail for those computers, or just skip them)
TheCleaner also wanted me to mention that you can add a -Filter {(DistinguishedName -notlike "OU=disabled,DC=ad,DC=example,DC=net")}
to that Get-ADComputer statement to filter out the already moved computer.