I understand I need to cut input wires at the amp and run new wire to aftermarket radio. The post I read says to cut at pins 3/8 and 9/10 for subs. The picture shows a pair of yellow and a pair of blue wites cut but the pins 3/8 are solid blue and 9/10 are blue with a brwn stripe. What am I not getting here?

 

Heres a pic of what Im talking about..

 

Here it is highlighted

 

Your big mistake is starting another thread on the same subject.
Why confuse the people who can help you with answers spread over two threads.