I use wired multi-flash, with an AF360FGZ, an AF240FT and (sometimes) the on-camera pop-up flash. This setup works for TTL synch on leading or trailing shutter curtain with my MZ-5N and MZ-7 bodies, and it should also work on other MZ (ZX) models.
Also, I make cable extenders to increase the separation between the off-camera flashes and between the flashes and the camera body. Cut a 5P cable in half, solder a PS/2 male connector to one end and a female connector to the other - you can then increase the distance between devices by adding one or more PS/2 mouse/keyboard extender cables. Be careful, the conductors are thin, so it is easy to cut them in two when striping off the insulation, and they will melt if you apply too much heat. Jim www.jcolwell.ca P.S. use 3-conductor stereo headphone cables to make similar extenders for Cable Release F and Winder remote cables.