The entire headpiece excursion is basically a side-quest to introduce Marion (because Jones needs a sidekick) and to explain why the Nazis hadn’t already found the Well of Souls. Since the map room had a complete layout of the city and the entrance was on top of a prominence apparently in the middle of the dig site (since it overlooks diggings in one direction and leads to an airfield in another) there is really no reason not to have uncovered it even if they didn’t know it was special. Note that the Well was also apparently hermetically sealed (it sucks in air as they are removing the slab) but is full of living snakes and leads through a wall of slave corpses into the next chamber with an exposed external wall.
Like I said, the movie doesn’t make a lick of sense, and Indy’s actions are of no real consequence except that the US Army ends up with the Ark, which they bury in an anonymously labeled crate in a giant warehouse. (No explanation given for why this holy artifact of “unspeakable power” is not examined or any attempt to made to weaponize it even though Jones has presumably reported on its abilities; removing it from play is the smart thing to do but whenever have you seen a government do the smart thing, especially when it comes to potential weapon applications?) But the movie slows down just long enough to let you breathe, and not enough to ponder the improbables. Part of the problem with Temple of Doom—aside from the gross cultural stereotyping, the over-the-top sight gags and unfortunate sophomoric humor, and of course the grating Willie Scott, who is pretty much the complete opposite of Marion in every way—is that the pacing is really off, perhaps in part because a lot of the action sequences were ideas conceived for Raiders but that they couldn’t work into the story or runtime. Those sequences, like the opening Busby Berkeley-turned-Billy Wilder free for all, are great but they don’t make for a very coherent story, which frenetic action sequences and then ground-breaking special effects (and the first PG-13 rating) couldn’t fix. There is a great pulp story to be told there, but it is lost in the mishmash of ideas and images.
Stranger