External Flash for Fujifilm digital

[Shotkatcher]

I have a Fujifilm S5600 as shown here with a telephoto lens. With a telephoto or wide angle lens on it has a rather large black area where the flash is blocked by the lens. I recently purchased a Vivitar 2600 flash and a mounting bracket because there is no hot shoe on the camera. This flash is not an auto slave and is origanally made for 35mm cameras. I did a little reasearch on these flashes for digital cameras and the sites said I should buy a safe sync slave unit. If I put the slave unit on the flash bracket and then put the flash on the safe sync will it still work? If anyone knows anything about this subject u please reply I would be very grateful Thank You.