There should be an IGB (insulated grounding bushing) at both ends of the conduit if they are using it for the ground back to the service panel. It's normally pretty easy to install if there isn't one, unless there are other problems, or if the conduit isn't intact all of the way back to the panel.
They look like this guy here:
Find Insulated Ground Bushing, 2" and other Electrical Fittings at Aubuchon Hardware
The bonding strap is not necessary if the ground terminal bar is fastened directly to the panel, without the plastic insulating blocks.