Just because molinari shows you a picture of the tranny pulled, does not mean you have to do that to replace one of those. It can be replaced with the engine and tranny in place but it is not a chore I want to do every day.
Once you get the original out you can restart the two bolts into their original holes and then slot the attaching holes on the new one and it can then slide over the bolts when re-installing it.
That maneuver makes trail replacement much easier if it needs future replacement. You can then just loosen the bolts and slip the old one off and unplug it, allowing you a quicker job on the trail.
Hope this is understandable to all who have lain under their Jeep at 2 in the morning to get the Jeep home. It will be a modification you will thank yourself for doing.