WinPower D2S / D2R Adapter OEM Xenon Lamp Ballast Wiring Harness Connector Socket Wire to HID Bulbs Converter Holder 1 Pair High quality AMP To D2 connectors for retrofitting HID ballasts for aftermarket for use with OEM D2S / D2R HID Xenon bulbs. It is manufactured using original Denso D series metal adapter with metal sleeve to ensure the same quality and durability of the OEM specification. If you have a retrofit HID ballast from which two wires come out but want to use it with the OEM HID lamp D2S/D2R, this is a must have without making changes to the wiring harnesses. All you need to do is connect the AMP connectors to the 2-wire ballast and the D-Series OEM/Aftermarket HID lamp on the other end.