I'm currently in the middle of wiring in two SkyView units and have read about others having trouble with the voice alerts if only one of the two screen's audio outs are wired to the audio panel. It sounded like if the screen with the audio out connected booted up first, the voice alerts worked but didn't if disconnected unit booted first. Is it recommended that the audio outs for both SV units be wired to the audio panel to ensure voice alerts?