I have a 3 phase transformer primary volt. 480 and secondary volt. 208y/120 . Now I want to hook up two panels off of this transformer , 1 208y/120v panel and a 240/120v panel , I know that the primary goes to H1 H2 H3 taps on the transformer and that the secondary goes to X1 X2 X3 taps . I don't have a X0 tap on the transformer to get the neutral , Do I hook all the grounds together with the neutral to the panels or what ???? 1st time had this problem !!!!