You own an Aquaero, right? How could somone help you, if nobody knows what you own. It could also be an Aquaduct.
It would be obviously a production fault if it were an Aquaduct.
Also, your screenshots are not really helpful at all, because it didn't show us how you've connected the LED(s) to the Aquaero LED terminal.
Do you use a selfmade LED + cable and mixed up the pins, or did you've a already configured one made by Aqua Computer?

If it's a wrong assembled Aqua Computer cable, you could try to remove the pins from the female connector and rearrange it yourself until it fits.

Citation

4.11. Connector „RGB-LED“
Connector for up to three LEDs or one two-color or RGB illumination module
(not included in delivery). High brightness LEDs (I max 20 mA, U 3-4V) may
be connected without series resistor, a series resistor is built into the aquaero 5.
Pin assignment: Pin 1: VCC LED 1
Pin 2: VCC LED 2
Pin 3: GND
Pin 4: VCC LED 3

However, what I can see from the first screenshot is, that it's not the factory configuration.
Standard would be...
Red: Blinks while alarm condition
Green + Blue: Off during alarm condition
But that didn't help with your problem.

Btw: Next time please give us more helpful information about the hardware you own, if it's selfmade or was it bought and already assembled/configured, some 'windows paint' drawings, photos or a youtube movie or what ever would be appreciated.

You have 6 options:
1. Register a complaint, send the cable back and request a replacement cable.
2. Theat the first LED as a write-off and buy a new one, in awaiting it's a good one this time.
3. A selfmade LED-cable.
4. No LED at all.
5. Live with it as it is now.
6. Or...the easiest and fastest way, rearrange the pins or tongues yourself until it fits with the colors of the LED. The black cable (ground) is in the right spot of the connector, because otherwise the LEDs wouldn't light up. You can orientate yourself on that. You only need to rearrange the red, green and blue cables. You can use a small needle to remove the tongues from the connector.