High cluster uses I-bus...low cluster uses K-bus. But as previously mentioned...you haven't given us enough vehicle detail (model/model year/build date) to be of much help. We have no clue what you have so making suggestions is difficult.

The images below are topological charts of the two different set-ups:

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• 2015 f06 650ix GC (Moonstone exterior/Cohiba brown Merino Leather interior)
• 2014 f15 X5 50i (Space Gray exterior/Mocha Nappa Leather interior)