Disclaimer:
I give no guarantees or warranties on this, and you could be working with high voltages, so if you're not comfortable doing this, you may want a qualified electronics tech of some sort to help you out.
what you'd have to do is find out how the Rapid Wave flash is triggered when using a foot pedal or 'auto press connection'...
at the very least, the foot pedal connection may work with some modifications to the cable.
if your diamondback is set up like our sportsman, the flash 'sockets' on the side of the press are attached to relays that the press 'closes' to activate the flash. The press closes the relay for as long as the 'quartz flash time' is set to.
you could rig up a cable to connect from the diamondback flash socket (that twistlock looking plug) to the input on the anatol flash.
you may also get lucky on the anatol flash if it has a mode for interfacing with an auto press... you may be able to verify this by using the foot pedal with it and holding the foot pedal closed while in the mode for attaching to an auto press. If the flash stays on for as long as the foot pedal is closed, you can use this mode with your diamondback to control the length of the flash from the diamond back's control panel.
hopefully this isn't too confusing...