KEY1 and KEY2 wires are often found on an android Headunit loom with little or no explanation of where to connect them to or what they are for.
Do you need to connect KEY1&KEY2? Will the android headunit work if you don't connect KEY1 or KEY2 wires?
SWC are Steering Wheel Controls. The stalks near the steering wheel that are used to adjust the volume, skip a track forward, backward and pause.
SWC come in two distinct formats, being either factory fitted by the vehicle manufacturer or aftermarket universal fitted.