Extender GX I/O - PWM outputs programming?

Hello all, i have new GX extender And need to use Its PWM outputs for 0-100% power outputs of connected SSR relays for water heating…
How to proceed IT in NODERED?
What nodes and parameters needed to add for correct function?
I have tested it, but LEDs still not dimming

Thank you

Edit: Venus version 3.62 actual. Extender IO not visible neither in device list nor I/O menu. Only in device s overview in VRM. Relays functions tested via node red OK, PWM OUTs no feedback/dimming…