You will have to remove the console and fuel tank hatch to access the pickup hose unless you know exactly where the pickup hose is. You could then install a pie plate on the deck hatch and do it that way.
I would just remove the console and the deck hatch. Then you will be able to inspect gas tank, hoses, etc. If that is the original tank you might be on borrowed time anyway. This will be a good reason to check it all out.