What does the T piece connect to?
If you follow the guide by @ZipcodeUK He guide you through. It basically fits into a hole created by the removal of a grommet.
I didn't add another usb. My radio is aftermarket and even the original doesn't work.@Ed Webb @ZipcodeUK did either of you do the the added 2 usb's?
It's a lot of dollar to add an additional usb