Help with advent otopri1 steering wheel control

Hello everyone,


I just recently purchased a 2011 Prius one and tried to upgrade the head unit with the advent otopri1. The description of the HU states that it is plug and play includin. The steering wheel control function.

After hooking everything up, ion t everything to work accept the steering control. It looks like the connector for that can't fit anywhere else.

The connector in red has no spot on the harness or the back of the unit.

Does that mean I have to get the axxess or pay swi adapter?

Thanks for the help!