yamaha multifunction tacho wiring

[archie]

i am attempting to swap an analogue tacho with oil warnings for a digital tacho which includes oil warnings and trim settings. the problem i have is that not all the wire colours match up. on the digital gauge i have a black with a white stripe, and two greens, one with a red stripe and one with a white stripe, i presume that these relate to the oil warning lights but am unsure of which wire relates to which warning. can anyone help or suggest a way of testing them

[boats.net]

The oil indicators and trim gauge wires connect to wire harness that goes to engine, you will need this harness if don't have it.