2012 ram 2500 6.7 abs help

[Jmeeks725]

I just purchased this slt. Abs light on, service 4x4, cruise control doesn't work. When jacked up on blocks 4x4 engages and disengages. Then I look into abs there is a speed sensor in rear diff no plug. There are 2 available plug in's 3 feet away. I am thinking someone swapped rear ends. Found this out when I went to get rear pads, they didn't match so I took one of the old ones in and it matched a 2005 truck. So my question is are there abs sensors at the wheels on this 2012. Do I need to get tone rings added on the axles or do I need to find adapter to plug in diff sensor to one of the plugs. Few questions. Thanks in advance.

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