Mine plugs into the OBD2 - but I dont have a round connector so its all done with same - if someone you know has the software or if you have it the cable should have come with both connectors in order to be able to read all modules

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards