Quick help needed - wire question

[Ed726]

What are the key 1 and key 2 wires for and where do they get hooked up?
I have everything apart and installing.
Also, my last head unit had rca out for subwoofer left and subwoofer right, with left and right for each one for a total of 4. This deck only has 1 subwoofer out so I assume 2 "y" splitters should work?

[Jammy]

Hi, could you please tell us your order number and product SKU?
Normally the key1 and key2 wires are for connecting the original steering wheel control based on the analog resistance signal.
About the subwoofer, you can also connect the subwoofer to one couple of our audio rca output cable, such as Rear Out L and R, Front Out L and R.
Regards

[Ed726]

Thank you, I already figured out.