Had someone ask, so here’s a quick and rough explanation
You need to make SIX solder connections
First, lift the centre two pins of USB1 on the mini
Second, cut off the plug and solder four pins from the USB hub cable to the bottom of the USB1 connector pads on the PCB
Third, cut off the mini USB of the longer USB cable and create a bare end. Solder two data wires to the lifted pins on the mini’s USB connecote
This then attaches the USB hub in full to the minis processor
And just uses the physical connector on the mini as an extension of one of the sockets on the hub!