Hose was made to fit a number of different models. The "electrical connector" bit has an optional click fit cover. Depending on model this should be supplied with the hose.
Local parts guy told me all this and gave me the cover for free. Usual price is around $8.
The old hose on my vehicle (2013 LCI model) had no optional connector/cover outlet.

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2015 X5 xDrive35i MSport
2013 X5 xDrive35i