Simply put: Currently you can't!
Unfortunately the SensorPanel is still lacking support for tasbar integration. With this proof-of-concept one of my main goal was to show the devs the potential and that it's worth the time and effort needed to implement the feature. IMHO the otherwise empty space on taskbar shouts for this kind of utilization.
The main problem is that the necessary API calls ('deskband') are officially not supported, they are in some kind of legacy status starting from Win7. It's a controversial topic because on the other hand they are still definitely part of Win10. At least two prominent features I know of (i.e. search bar and people bar) are based on them.
Anyway I'm curious to know the devs actual standpoint on the matter. They are probably on the fence. Fiery: Shoud we hope or not?
Eagerly waiting aside, at the moment I have no other choice but to place the SensorPanel beside the taskbar...
...and resize windows accordingly.