DB-37 solder-type female connector and hood. This cast metal hood comes with six rubber grommets to choose from, in order to shield your wires from rubbing against the hood. Each grommet has a different inner diameter, such that one will fit your specific wire bundle size.

Remember, if you're using the relay board and you didn't buy a relay board cable kit, you'll need one of these in order to connect the harness to the relay board!