Led pins in Arria V

Hi to all

I'm new in FPGA design and I'm doing a small exercise in arria V with the LED's. After instantiating the qsys system in the quartus project, I have to assign the pins in the pin planner and when I check the development board reference I see that the pin number of the LED's is U16.M19 but I can't find that number in quartus II. Indeed the pin number M19 is assigned to the LCD display. Anyone knows how to assign this? OR any other recommendations to do it?

Thanks in advance!