Yeah it doesn't make much sense showing us without explaining how it's done. Hopefully the OP will respond telling us what he did.
I'm seeing there is an extra cable going to the gopro right above the hdmi plug. I'm assuming this plugs into the expansion port on the solo and to the micro usb on the gopro and the op is using solex to use the pause button to start/stop the camera shutter. Maybe he'll shed some light on this?