pictures / instructions on Disconnnecting various Electrical Connectors 2000 Cherokee

Is there a book, manual or WEB site that I can use to determine how to disconnect various electrical connectors without breaking them?

Interesting topic.
Didn't see much in the FSM on removing the various plugs.

Most of the plugs have a tab, that needs to be either pushed or lifted. A few have sliding locks.
Take a good look at the plugs you can get close too and look for the tab or lock.

The sensors on the throttle body are all push-tab type. The tab needs to be lifted away from the plug, while gently pulling the plug apart.
The oxygen sensors are the lift-tab type, the tab needs to be lift up, away from the plug, while pulling it apart
The hood light has a lock that needs to be pulled back, releasing the plug. Other plugs have locks that need to slide sideways.

Before reassembling a plug make sure the connects are clean and they have been given a light coating of dielectric grease.

May not apply to the OP but the plug at the firewall on the coil rail is (for me) a complete PITA. As stated above, find an accessible plug of the same style and practice on it but with your eyes closed, standing on your head with both arms tied behind your back.