You can't connect the LCD to that type of controller. The 5 way connector carries data to communicate between the two, without those two two wires on the controller, it can't communicate. You can use the LCD as a battery gauge and main switch, but that's all. None of the other functions will work, and it'll go to sleep after 5 minutes because there will be no speed signal. You might be able to change the sleep mode in the settings.
To use the LCD as a switch, the red and black wires go to the battery and the blue to the controller's ignition wire.