Pro-series 4 stroke tach wire color code problem

[Rappahannock River Fever]

I just bought a Yamaha Pro-series 4 stroke tach w/ overheat and oil lights, but can't find any paperwork for it. I'm trying to attach it to a 703 con*****er. The tach is simple to hook up, but the oil/temp wire colors don't match anything on the 703 harness. what do I use to hook up the oil and overheat lights with? Thanks.

[boats.net]

No you will need 68F-82553-70-00 wire harness to connect gauge to engine for oil pressure and trim sender.