54 dash turn signal light question

[vintovka]

I would like the single turn indicator to work like the original. I'm using the wiring from the 84 GMC K!0 chassis it sits on. The separate left and right indicators both work (as do the hazard lights) but would like to wire them so both illuminate just the single turn light in the speedometer. If this cannot be done would like to see pics of how others mounter separate indicators on the speedo face.