RV Custom Products Battery Latching Disconnect Relay
Part Number: RVC1002
The two most common ways to wire the switch to the relay are noted in the picture gallery as well as the polarity logic behind there functionality.
NOTE: This relay can only be wired to a momentary (On) / Off / (On) momentary switch. If wired to a On / Off / On switch then the coil of the relay will over-heat and burn out. See below for the common switches that are used with this relay type (Links):