Intersystem bonding terminal - how direct?
Not sure why 2-0 is used for residential with rod pipe and plate electrodes--#6 is all that is needed per code per 250.66.A. The IBT attached to the service equipment or disconnect is according to code not a hack but self forming screws are needed, not self tapping, or #6 to the grounding electrode conductor. 250.94.4  the length my jurisdiction uses is 20’ (see 800.100.4) except on motor homes it is allowed to be 30’. If this distance is not compliant this is when they require a 5’ ground rod (see 800.100.b.3.2). Hope that helps