I tried installing alpine speakers in the front speakers of my 2002 civic ex and the driver side went smooth. There were two wires to the plug in on driver side but on passenger side there are four. Im guessin two are for tweeter but how do i splice them into my alpine?

 

Kind of strange that only one side would have the "paralleled" tweeter leads at the speaker plug.
Anyway it is as simple as finding the two leads that come from the HU and connecting them to the speaker, should be red/green (+) and brown/black (-), although both sets may be the same colors, only the set from the HU will work. 94