I think the pinout of the blue plug will be the same carrying power, tape audio, iBus and illum - obviously check on the wiring diargm. Than you have an RGB cable, it would go into the white connector of the 16:9 and into the unoccupied pins on the nav blue connector.

Any old RGB cable will do, as you will be cutting the connectors off. It will be 75Ohms (50R audio cable won't do) and try to get a reasonable quality cable with double screening although don't lose too much sleep over it. Get the connectors first, as they could be a PITA to find, especially the keyed white lever lousing. You may need a generic unkeyed version.