THX Vald, that has helped me!
I do need it for the 737 Zibo AFDS unit test switch, to control the red and yellow LED for "A/P P/RST" and "A/T P/RST". I have no coupled (double) switch, only a single one. So I've use some avaible spare PINs I had left over in this part of the MIP.
Thank you for your explanations.