I can see a diode, transistor, 3 resistors and 2 leds on the photo. Given additional information on the photo that input is active low and 2 leds are power and active an educated guess would be that transistor is p-channel mosfet or pnp used as a switch, diode is there for relay back emf protection, 2 resistors are led current limiting and the last resistor is on transistor gate/base.
So most likely the schematic looks like this:
Note, you still have to verify it yourself, this is just a guess. Without having the board and tracing connectivity with a tester or at least visually it’s hard to do better.