|PIC MPG meter / DSC01029
2 Pin Connectors: Top row from the left: 12 volt power (red & black), Fuel sensor (2 connectors used for wires red, blue, ground)
Speedometer (black cable). Bottom connector is for optional speaker. the other two 2 pin connectors are not used. The DB15 connector on the right hand side is used for the LCD display.
Bottom RHS you can see the 10KOhm pot for adjusting LCD display contrast. On the LHS you see the blue 4MHz resonator and some capacitors for the oscillator circuit (see Microchip books for detail)