2nd serial port on new 1U server

I just set up a new HP DL360G3 1U server with NW6. These new servers only come with 1 embedded serial port, which I am using with a modem. I need a 2nd serial port for my APC UPS connection (Powerchute).
I found an add-n serial card from SIIG and installed it in one of the 2 PCI slots.
Now how do I load AIOCOMX for the second serial card so that Powerchute knows which card it’s connected to?
Here’s what I’ve got now for the modem:

LOAD AIO
LOAD AIOCOMX INT=4 PORT=3F8 #COM1

If I just add another line like this:
LOAD AIOCOMX INT=3 PORT=2F8 NOFIFO #COM2

will this work, assuming the Powerchute software will detect it’s on COM2?