How to wire the InDTU324 with USB-serial adapter?

How to wire the InDTU324 with USB-serial adapter?

As the picture shows:
1. Blue Wire: RX1(pin2 of InDTU)--------TXD(USB-serial adapter)
2. Red Wire: TX1(pin3 of InDTU)--------RXD(USB-serial adapter)
3. White Wire: GND(pin8 of InDTU)--------GND(USB-serial adapter)