[4dn4n]

Hi guys.. Im new here. Im have bmw e90 with base sound system. I have bought vibe speakers (2 way) for front doors. I am planning to install them myself but I am not sure how to connect the wires that come with the speakers.. I will post the pictures below.. Im unsure how the blue adapter is connected to the speakers.. Can some one please help.. I would really appreciate it. Im know where the speaker wire goes but not sure how the blue adapter is connected. Please help guys.. I would really appreciate it.