High Pitched Sound - Contactors?

The Facebook Arcimoto Owners group is discussing a high pitched whine that tends to show up when accelerating. One person noted it tends to happen when the FUV is over 85% SOC and you accelerate quickly. 

Here is the sound from 2-4 seconds.

I don’t have it happen often but some others say it can get worse over time. Our group expert feels it might be one of the contactors going bad. The contactors are in the backbone (tunnel) with the HV batteries. Getting into is a real PITA as you have to remove seats front plastics, handlebars, and whatever is in the back, likely the trunk, etc to get the the lid. Contactors are about $100 each and the group expert said Arcimoto would often just replace all 3.