I am looking for a latching relay motor start and stop circuit
It looks like you are using the DPDT relay as a reversing switch. Wire the contacts to the motor and the power source. If you add a SPST toggle switch, that would be the main power ON-OFF switch.
Now you just have to control the relay. Relay ON for one direction, and relay OFF for the other direction. A second SPST switch could be the forward/reverse switch.
Or instead of 2 switches you can use a single center-OFF, DPDT toggle switch. One set of switch contacts turn on the motor circuit, while the other set of contacts determine if the relay is ON or OFF. Do you need a schematic for one option or the other.