could anybody tell me which one is #1 and #3

HW status:

ASIC slot #1: 73.0 ℃
ASIC slot #2: -
ASIC slot #3: 73.0 ℃
ASIC slot #4: -
ASIC slot #5: 64.0 ℃
ASIC slot #6: 68.0 ℃