Hi guys - I'm looking for a little bit of help regarding the wiring of my new depth finder. I bought a Hummingbird HDR 610 (basic digital depth finder) and I've gotten into wiring it. I'm installing it in my '03 Outback LS which has 2 extra rocker switches on the dash - one is on/off and the other is 3 position, on/off/on I assume. Neither appears to be in use for anything.

Given that, my issue is that I don't know how to wire it up (specifically which prongs to wire to which wires. There are only a + and - coming off the Hummingbird and I know how to wire them directly to the power panel under the dash but not how to incorporate the switch.

Finally, let me say that I was able to run the negative to the power panel and run the positive from a prong on the 3-way rocker but it seems strange to me to have the positive coming off the back of the switches and then still run the negative all the way over to the power panel.... does that make sense - is that normal?

I think this must be easy so any help would be greatly appreciated.

Thanks,
Thomas