how to force enable qhusb_dload on mi3?

Nov 3, 2013
Hi all, anybody knows where is xiaomi mi3w test point to enable qhusb_dload for unbrick?
I have one only detected as hid device, I'm sure there's a way to force qualcomm diagnostic to load cause any phone does but tried a few points short to ground and nothing happens.
With a discharged battery it detects hid devices, with charged battery nothing is detected.
Any hint?