Is that safe to leave USB Vbus wire uncut, so when I put 5V, powers goes both to Panda II and to USB device? :-[
It is a risk that you should take if you really know what you are doing
I’m just trying to make USB Host cable for Panda II.
Didn’t get should I cut Vbus or not?
Maybe I am not understanding what you mean. Please see http://ghielectronics.blogspot.com/2011/03/usb-host-support-is-added-on-fez-panda.html
Yes, the question is about this:
If I connect 5V from Panda II output right to VBus line, should I cut VBus line to Panda II?
No you do not need to cut it