What does this achieve?
I would imagine that the OP is no longer able to charge his G9 via the microUSB port. His fix allows power to be delivered via the 3G USB connector - but of course the software in the tablet does not realise it is being charged, and so you cannot do operations (such as firmware upgrades) that are only allowed when the tablet is on charge.
There is also a fire risk, as charging the tablet in this way bypasses the protection circuits and the power negotiation protocol that is normally performed when charging via the microUSB socket - but if the only alternative is to junk the tablet as it is out of warranty, this is a risk that people might be willing to take. Keep an eye on it whenever charging like this, though!