2012 Honda Civic Radio Wiring Diagram

Hello - hope all is well. I apologize if this is a duplicate, but does anyone know where I can find a wiring diagram for a 2012 Honda Civic LX factory radio (I believe the standard - I did not have in-dash nav)? The main reason I ask is because I finished installing an aftermarket radio (using aftermarket wiring harness) and it doesn't seem like im getting any sound out of my pillar tweeters. Based on what i've seen at the plug, there are only 8 speaker wires and they are all hooked up, so I am trying to find where those tweeter wires are hiding. Thanks for any vehicle information you can provide!

Left Front Speaker (+/-)     lt. green - pink or brown - yellow     +,-     radio, gray 24 pin plug, pins 14 - 15 Note - Left Front Speaker (+/-): On models with amplifier, the speaker wires are lt. green - pink (woofer); red - pink (tweeter) at the amplifier right of steering column, 18 pin plug, pins 12 - 3; 11 - 2. Right Front Speaker (+/-)     gray - brown or green - red     +,-     radio, gray 24 pin plug, pins 18 - 19 Note - Right Front Speaker (+/-): On models with amplifier, the speaker wires are gray - brown (woofer); white - purple (tweeter) at the amplifier right of steering column, 18 pin plug, pins 13 - 4; 14 - 5.