I tried that several times for quite a few minutes each time, I tapped and shook the cables - nothing!
The front brake is naturally directly below the lever, no high spots to trap bubbles. The back is more awkward. Even the 'simple' bleed (just a bowl on the lever bleed point) didn't work (I had a stand by then) , I had to inject from the caliper and it was full of bubbles.
Maybe Wisper keep the 705 cost down by not fitting self bleeding brakes: they are unbranded (unlike the derailleur and other parts) and Wisper actually have a video tutorial showing you how to bleed them.