this is a complicated thing to install. The button to activate this is located on the indicator stick. Further, when you turn on the signal of this side, the cam automatically turns on. As far as I know, it's display is in the i-MID screen, not in the multimedia.
hence to make all this work, you ll need to source the required items plus an expert who can wire all this. BUT, there is another issue, as far as I know, the lane watch came only in US models, hence you ll only find the indicator stick for the LHD car and also the mirror assembly for the left hand car as well,
both of which aren't compatible with our version of civic