front ADD actuator

So today I removed my front actuator ( its new) because I couldnt get it to unlock so I figured out which pins to touch and got it to disengage , so I put it back in and thought I would leave it disconnected so it wouldnt engage accidently . So I get it all buttoned back up lower it down off the jackstands ,Go to the back and kick my wheel chock out and the damn thing rolled back and hit the garage.I`m like what the hell ? I know I left it in park so I look and it is so I get in and start it ,put it in drive nothing but a whirring sound ,I`M like what the hell how did the tranny go out just sitting in the driveway? So I thought maybie the ADDbeing unplugged has something to do with it so I crawled under it and plugged it in and sure enough the tranny went right into drive. I had no idea that they were tied together