ElevatedVehicles I have a canbus swc controller and I have it connected to key 1 and key 2. However, here is the trick. My car has two canbuses. One for engine and body, second one for multimedia and swc. So, this canbox for multimedia (connects2) has options and can simulate resistive buttons (for pioneer and for Chinese android HUs).
Any other canboxes from simple, hiworld etc - I didn't see separate wires to connect to swc, they send commands to HU via UART together with all engine related messages. In this case, that won't work, an app or settings would be required to remap incoming uart messages