This is an example of these three chords looking more difficult than they really are (the Bb major repeats once within the four bar form.
There is an underlying C pedal to the entire form and the only note you must be careful with is the Bb since it works best only on the second and fourth measures of the Bb major.
There are a generous number of “common tones” in their usual arrangement of more sonorous to least in the listing of those notes below. Different sounds come in and out throughout the span of the track in order to provide some variety.