Hello I just bought a 2008 silverado 1500 with rear drum brakes I have the abs sensors but they aren't plugged into anything I need help with which wires connect to the rear and sensor and the wire colors so I can tap into them and run new wires to the back. Thank you please help if you can

 

ya know why they aren't plugged in, probably someone didnt want them causing problems.

 

Is the abs light on?