By removing the dash tweeters in the steps below as pictured and install the after market tweeters, you will improve the sound of your factory system, you may notice not only clearer more defined sound but also find the bass even better once you complete these installation. You may have to splice wires or cut the connector, in my situation I did not need to do that, I would use bullet or spade connectors if needed leaving males on the wires and females on the factory tweeter connector assuming you will want to save them to install them if later you decide to sell your truck. The same thing for the new tweeter crossover wires I would crimp a female connector to each wire and plug them the to the factory wiring. You can find these connectors on Ebay or at your local Home Depot or Lowe's.
Factory Wiring Color Code for the front speakers and tweeters
BLUE Front passenger door speaker (+) Right tweeter (+)
RED Front passenger door speaker (-) Right tweeter (-)
LT GREEN Driver’s door speaker (+) Left tweeter (+)
PURPLE Driver’s door speaker (-) Left tweeter (-)
Factory Wiring Color Code for the front speakers and tweeters
BLUE Front passenger door speaker (+) Right tweeter (+)
RED Front passenger door speaker (-) Right tweeter (-)
LT GREEN Driver’s door speaker (+) Left tweeter (+)
PURPLE Driver’s door speaker (-) Left tweeter (-)