This kit has everything you need to wire your 2 compressors.KIT INCLUDES:1 x Allen Wrench1 x Dual Relay Socket2 x Mini ANL Fuse Holders2 x Mini ANL Fuses 30-amp fuses3 x Fuse Taps (Mini/Micro/Standard)3 x 5-amp Fuses (Mini/Micro/Standard)Pre-crimped Nickel Plated Ring Terminals40-ft x 100% Copper 8-gaugePower Cable (2 x 20-ft)2 x 40-amp Heavy Duty Relays w/LED indicators2 x 8-gauge Heat Shrinkable Butt Connectors5 x Stainless Steel Hardware Assemblies4 x Black Screws (for fuse holders)2 x Blue Female Crimp Connector20-ft x Yellow 18-gauge Wire6-ft x Black 18-gauge Wire20 x Black Cable TiesWiring schematic is online to download.https://indd.adobe.com/view/3969baf4-3776-4bba-b913-31422c6859d0