I am changing out an existing 100 amp service. I have an existing panel 20' away from meter inside of house which requires a disc. I plan on mounting disc immediately inside of house at point of entry. In the disc there are two terminals for grounding. I plan on using one for my egc to panel and other for gec to h2o line. The ground rod outside, I planned on running my gec to meter base. The inspector told me I couldn't ground at meter base. I obviously don't want to argue it with him, but I thought a gec could be wired from the meter base to ground rod. The inspector wants everything bonded in disc. The problem is I only have two ground terminals and I can't land the egc, gec to h2o, and gec to ground rod. Is there a dual lug terminal I can use in the disc and legal? Thanks