The windscreen washer bottle is located in the front of the left hand wing, similar position to the air filter on the right.
There is a myriad of pumps and hoses feeding the front wipers, rear wiper and headlamp wash, most of which are hidden by the inner wing. You should be able to get to them by removing the plastic inner liner.
From your description I suspect the blockage has forced a hose to unseat from a plastic connector. Refit and perhaps secure with a small tie wrap.
One word of caution...... the 10mm plastic bolts that hold the inner wing on tend to be bonded with rust to the screw from the wing. You could try using some proper penetrating oil, but I suspect the captive screw will still snap, so next time I do this job i have decided I will probably cut the plastic bolt off, leaving the screw thread intact and capable of being reused.
Good luck