I have a 480V 60A primary Delta & a 208/120V 100A secondary Wye. I was given a two barrel lug for X0 & the grounding ribbon has a 3 barrel lug. The primary & secondary are flexed with grounding bushings that contain a lug. This gives me termination points for two equipment grounds for the conduit,one for the grounding electrode conductor, one for the system bonding jumper( that is terminated on one end on a two barrel lug at X0 with the neutral conductor). Can I bond all these conductors at the grounding ribbon for the transformer?