The best bet is to remove the battery and the bin it sits in. That will give you really the only access to the discharge hose for the bilge pump. I had a 200 CCP, but I didn't have the battery trays aft so I just lifted the hatch and there it was.
If you want to remove or replace the pump itself, your only access would be through that pie plate. Do you use the live well in the stern? You could always cut out the bin of the live well and that would give you full access to the bilge. Just cut out the liner and leave the hatch in place. If I still had my CCP, that is what I would have done.