【200 Series Hiace Speaker Expansion Harness (Parallel Connection)】 First of all, this price is for a set of two, for the driver's side and passenger side. ⭐︎Product Description When adding speakers, you would normally cut the speaker wires and split them in two to connect to the existing rear speakers and the new speakers. However, with this harness, you can insert it between the original rear speaker and the inserted coupler, adding one positive and one negative speaker wire. ⭐︎Installation Method Run the added speaker wires to the location of the added speakers (3m). Crimp terminals that fit the added speakers to the ends of the extended wiring, and you're done. When selling the vehicle, to restore the original speaker configuration, simply remove this product and return the original coupler to the original speaker. The usage is as shown in the orange frame in the wiring diagram in the third photo. Red is connected to +, and black is connected to -. This is intended for adding speakers to the D-pillar or next to the rear air conditioner. ※ Please make your own judgment regarding parallel speaker connections.