I sometimes use manual triggers (PocketWizard Plus III) with multiple flash units. I needed a 3 way split sync cord, 3.5 mm - 1/8” to 3.5mm male to female fittings on the ends of the 3 way splitter so I would only have to use one sync for 3 flash heads. I have not been able to find a 3 way splitter so I ordered a Belkin mixit Rockstar which has the 3.5mm male plug and 5 - 3.5mm female ports. I just got it and tried syncing five flash heads with one PocketWizard. It works!!!! Just thought I’d mention it if anyone else happens to need something similar.