Well, let us just reason through a few bits of this.
Water seeks its own level. So if
@The6caseys drilled holes and water came up through them, there must have been water above the level of the floor of the head compartment. Otherwise, it could not have come up through the drilled holes.
Further, if memory serves, the ski locker is lower in the boat than the head compartment. Certainly the plug for it is farther aft. Which then begs the question: was your ski locker plug in or out? If it was out and if water did not come up from there, we can derive that there was no fluid communication between where ever the water was and the ski locker drain. If it was in, then that is an unknown (for the moment).
But it is relatively well known that if you have water in the ski locker and open the plug, it will drain to the bilge (lower, below the engines) and ultimately out the aft bilge plug outside the boat. So, had the ski locker plug been in, had there been fluid communication between the area below the head and the area near the ski locker drain, that water would have been filling the lower bilge (and up into the engine compartment through the massive port aft of the engines) to a level that was higher than the level of the floor of the head compartment. Methinks you would have noticed that...
So then we can deduce that
@MrMoose must be correct (something we could have deduced from his prior posts, but this deduction is much more fun): the only way that there could be water coming up from the holes is if there is no fluid communication between the area below the head and the remainder of the bilge.
We also know that the hull is not only self-bailing, but also unsinkable (it has been reported from tragic experiences that the boat will fill to just below the gunnels and will simply not sink below that). It has been reported this is accomplished with foam, and, in fact, if the bilge drains as we would expect it should, foam would be about the only way to accomplish such a feat (as the fiberglass is heavier than water, and if there is no air trapped between the hulls in an airtight manner, well, then the puppy would sink). So we know there is a flotation stuff of probably foam between the hulls.
Which means that there is indeed trappage of water in the forward part of the boat in between the hulls. QED.
P.S. The fixing thereof is left as an exercise to the reader. But as a hint, do you think going in from the anchor locker with a fish tape down amidships would work?