The PC connection on your camera is for hooking it up to a PC or a printer. Doesn't look like this camera can fire external strobes (except if you have the strobe fire when the internal flash fires, make sure you don't have red eye operational)..
You can connect the camera directly to a computer or printer with the provided
USB cable. If you specify the device you are connecting to beforehand, you can
skip the USB connection setting procedure normally required every time you
connect the cable to the camera. For details on how to connect the camera to
either device, refer to Chapter 9 â€śPrintingâ€? (~P. 137) and Chapter 10
â€śConnecting the camera to a computerâ€? (~P. 163).
AUTO : You are required to select PC or PRINT in the USB connection menu
every time you connect the cable to a computer or printer.
STORAGE : Allows USB connection to a PC and transfer of data to the PC. Also,
select to use the OLYMPUS master software via PC connection.
CONTROL : Allows you to control the camera from a PC using the optional
PRINT : Allows you to connect the camera to a PictBridge-compatible printer.
Pictures can be printed directly without using a PC. ~â€śConnecting
the camera to a printerâ€? (P. 147)