First off, I know nothing about flashes.
I have an optar 152M flash that fits on top of the camera, and I want to trigger it manually.
The flash seems to have a contact where it fits onto the camera (or is that just to locate it?), and two contacts coming out as a cable.
Is it as simple as shorting the contacts together?
[EDIT] Thanks for the answers. I just had a look inside the flash, and it looks like it was stored in a pond at some point. It's now in the bin!