Trying to install an aftermarket multimedia head unit in a 2007 MDX base, non-Bose model. Can anyone help with the wiring configuration?

 

it didnt come with a harness?

 

I purchased a Metra 70-1722 harness adapter that only allowed me to connect the unit to the power connections. I cannot seem to find a way to hook into the speakers

 

so, there are open wires? color coded to factory???

match the colors, twist and heat shrink it.

 

The wires are not color coded to factory on my radio, and there are also preamp connections

 

I'm working blind here...Give me more info to work on..
Perhaps a pic

 

I don’t have a picture right now, but there are five harnesses that plug into the factory head unit. One is the antenna, one is power and ground, one is the speakers, one may be preamp connections, and one may be the Sirius XM tuner. I can’t seem to find a way to determine which wires I need to hook into my aftermarket radio to get the amp to kick on and the speakers to play sound

 

*Update* going to most likely install a USA Spec BT45-HON3 adapter into the Sirius XM tuner and use that for Bluetooth