Make Blender's rigid body constraints 'connect' to actually connect and change multiple parameters

I was having trouble getting the rigid body constraints' "connect" function to actually connect after using cell fracture because I kept overlooking something simple I couldn't see in all of the tutorials: which is you need to have a physics object selected before it actually works. Simple really, but after finally discovering it, I decided to make a tutorial explaining it so you don't get stuck either.
Similarly, I wasn't able to change multiple parameters at the same time since I left the "Emulate 3 Button Mouse" accidentally on. I show you how to fix that too.

[@Hometmc]

I love when presenters mention all the travails they went through to get to the final solution. Well done.

[@bennie.379]

great example thank you!

[@powersprouter]

helpful thank you