Water leaking into my 1999 Toyota Camry

After the rain, there is lots of water puddled in the rear floor wells. It seems to be coming in from behind the dash. The sunroof drains have been checked and cleared. Where do I access the drains just in front of the wipers

If you open the hood, at the base of the windshield you’ll find a plastic panel that can be removed to gain access to the wiper linkage trough. The wiper arms will require removal first. Once the panel is removed check the trough for rust holes. If any are found they can be patched with small pieces of sheet metal and with a silicone sealant. The drain holes for the trough are located at each end of the trough.