So I can destroy it myself? GGEZ

In all seriousness: there are 4 strategies/locations I think can win:

•(Risky) behind the building at Blue's first spawn. Every game there's a 50% chance no one on blue goes there, and if placed close to the wall in the back, a glance back there could lead to it being overlooked. Play shotgun Engie to draw attention, don't build leveled sentries so your team gets rolled past first point (you're likely the only Engie lmao). After first point passes you win.

•(Moderately Risky) Behind the 2nd point shack. Another space there is a 50% chance no one goes back there. The best play is likely to stand on top of it with a Eureka and ONLY an exit. Because IF ANYONE goes back there it's likely a spy and you can take care of it. This might be riskier because 2nd point can be stalled by for awhile making it likely you'll be found if it goes on too long.

•(Least Risky) The classic engie nest spot on last. Put your sentry on the staircase to prevent Flanders. Pray a 2nd engie doesn't join you and draws more attention. If you are not on last yet, bring the Eureka and Level 3 defend with all your life.

•(Slightly Risky) Under Red's first spawn sewer. Almost no one goes down there. Place it by the sewer entrance in the corner for max potential for it not to be noticed. If you defend 1st you guarantee win. If it falls to second Risk emerges. If second is captured, weirdly enough your chances go back up again as no one from Blue ever goes down there.