I think that's because the halogen equipped X5's (pre-facelift) have 9006 connector on low beam and 9005 on high beam, #1 actually connects to the H7 bulb itself (which is used on Depo low beam), then outside the headlight you connect the car's low beam socket to #3 and the high beam (9005) socket to #4

And you're still stick with #2 for the angel eyes, I'm actually disappointed that Depo does not include a wire harness for the North American models that don't have a stock parking light plug.

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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