Now one very weird thing happened after everything got all buttoned up . Pay attention here. When I went back to insert all my connections and when I put the POWER Mag safe plug in even with the MBP closed it turned on. Very strange that it did that and it did it on both machines I owned. This time I hard pressed it off until I finished all my connections.
I would on the side of caution as soon as your done turn it on without anything connected . I think somehow when you disconnect the battery something resets itself and as soon as you put power to it it powers on. Rather see folks not connect anything first time and you power it on first than shut down and reconnect everything.