I was able to fit it between the air box, the coolant overflow bottle, and the shock hoop. It barely fits, but it does and again will work great for now.
I thought of needing to vent it to. I drilled a hole in the lid and I ran several feet of my R/C airplane fuel line from the lid up by where the passenger fender, hood, and firewall all meet. Its a silicone line so I drilled the hole in the lid slightly smaller so its a nice snug fit without pinching off the line. This allows it to be vented so when you use the washer it doesn't create a vacuum in there and make it not work since the lid has an o ring and it has snap latches closed. I used this style and that vent tube instead of just a hole so that when I am wheeling its all sealed and none will come out. (That's the plan anyway)
Really the biggest problem is that its kind of a pain to fill. You have to fish the whole thing out of there, which when the lid is on takes 5 minutes, fill it then put the lid on and fish it all back in. But what do ya do its tupperware, lol. I put a gallon of washer fluid in my action packer that stays in the truck with my extra oil, trans fluid, coolant, brake cleaner, coveralls, lights, tow straps, small sand shovels, etc. So I have more if needed since its a small bottle, factory one is near a gallon I think.
The plan is when I have time make a washer bottle and a coolant overflow out of aluminum sheet metal that have the right shapes to maximize there capacity and fit it all neatly in the engine bay. But as with all of our forum projects time is slow to come by.
I'll run out and grab a few pictures. (It's 15-18* outside burr)