Right now we are getting an intermittent error in iLO stating that "Power Supply 1" is failing. The issue is that there are two power supplies, and neither one is clearly labelled as "Power Supply 1." Since it is an intermittent issue, the error comes and goes (but appears resolved in between). We can't really look for an amber LED because right now the server doesn't detect a fault with the PSU. We want to pull the PSU and replace it with a spare we have on site. So, looking at the server from behind, is power supply 1 on the right or on the left?
From the rear view, power supply #1 on a ProLiant DL360 G7 is the right-most power supply bay.
From the quickspecs documentation
According to the diagram here, Power Supply Bay 1 is the one on the right, closest to the edge of the server.