Reply to F1 LED's in user mode

I am mapping hot cues to the f1's pads in user mode, (not overwriting the factory control, but using condition that remix slots are empty) as I have Tekken's midi mode mapping installed. Is there any way I can map the led pads to light up when a hot is saved on them? When I try to map an output to a pad the control manager just says inappropriate control, and the pads aren't in the drop down menu?
Thanks