This link https://support.withings.com/hc/en-us/articles/360024481313-BPM-Connect-Positioning-myself-before-and-during-the-measurement shows two left arms in the image item #2
Several videos add to the confusion - since the Brachial is located along the center line, that diagram does not help understand how the position needs to be for accurate readings, or the tolerance for position based on the devices construction.
My question is simple - How should the device be aligned axially on the upper arm? Should the body of the device be along the inside (A), outside (C), or centered (B) along the arm? If used on the right arm, is there a similar positioning? If it is "Button up", will the device measurement be inaccurate?