Reusing door key leds

hi there

my old alarm is a Tecnoalarm TP5 with tpskn module, which ams/disarms alarm with a key.

At the door I have a key reader that has 4 leds to show alarm status


internally I have a small board which drives the leds.

I'm not interested in reusing the key reader (I'd like to do so, but it works with serial communication) to arm/disarm the alarm, but just the leds.
Is there any way to do so?