2015 Silverado routing speakers wires through the front door?

[Zori Marfazelian]

I have a 2015 Non-bose Silverado. Im adding new speakers all around and want to run new 12 gauge wire through each door to my amp. Now the issue is routing a positive and negative through that factory plug under the rubber gromet for the front doors. I have no problem drilling into the factory harness where there is no pins being used. I can the door side plug easily but the female which is towards the interior is way to hard to get to especially if you have big hands. The rears are easy because the molex plug for the rears are easily accessible. I will NOT run the wires from the back of the headunit even though this is the recommended option because i want to leave everything how it is factory wise. I have seen multiple posts with this issue and a lot of people have done it this way but their answers are very vague. If anyone has done a system this way, can you please give me some pointers (kind of a step by step) on what to do? 

 

Thank you!