My wagon sat under a tarp for a few years and when I got it back on the road a couple of the hoses coming from the tank had split, lift your r/h rear seat and you'll see an oval plate with about 10 X 8mm bolts, take it off and check the connections coming from your tank, might need to start the car to see if it's leaking or stick your fingers in there to see if they get wet, also tighten the screws on the plate holding your fuel pump in place (under the plate you just took off).
There will be a similar set up on the other side too, after fixing all my hoses the car still stank with over half a tank, I checked that & it was finger tight letting fuel pour out on corners.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.