Not used on his race run, but reportedly, Bruni's Demo was bristling with electronic data acquisition hardware during practice.
An accelerometer was placed on the seat stay, just behind the rocker pivot location.... Note: bighit117 says: "If you look closely, its actually a pressure sensor that's mounted in-line with the rear brake hose. They were probably watching how hard he was on the stoppers. I see them all the time being an industrial electrician."
Come race time, the pigtails to the sensors were taped and secured to the frame. Notice the spacer under the shock spring.
A tell-tale hole in a cobbled up handlebar mount probably held a button or toggle switch that sent commands to the telemetry system.
The short shock extension link appears to have been made in a hurry. It may function only as a place-holder to adapt a different length shock.
The extension bolts directly to the standard eyelet of the Vivid damper and pivots on the rocker.