In general USB is a simple point to point connection, where one end of the connection is the master, and the other end is the slave. Most USB devices are designed and hardwired as either master or slave. The only exception to this is the OTG port which can be master OR slave, but can never be both at once. It is simply not possible to use an OTG port as master AND slave at the same time. You need to choose one or the other at any given instant, and the turn-over between modes takes quite a bit of time.
There is only one USB port on the 410 processor chipset, which is an OTG port and you need to choose weather it is in master or slave mode. The hardware on the 410c board does exactly this, it either forces the port to be a slave if you plug anything into the micro-USB connector, OR if there is nothing attached to the micro USB connector then the port is forced into master mode and it connects to a three port hub on the board. Two of the ports are on the two USB Type-A connectors, and the signals for the third port are on the High speed connector.
I’m not sure why you would want to create external hardware to do exactly what the hardware onboard the 410c is already doing.