"Peak occupants" and "Full-time equivalent (FTE) occupants"

We have a multiple building situation. The changing rooms of one of the buldings (named "P10") serves to the population of the entire campus. In another question we posted here, we were informed that the population who used the showers and were not from P10 could not be considered as visitors, because visitors don't use showers, so we followed that instruction for WEp1 and considered them in a separate fixture usage group as FTE. However, for the sake of PIf3, should we include the "shower population" in the "Peak occupants" or in the "Full-time equivalente (FTE)" occupants"? Thanks