The area you are on about Andy is this here.
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You can see the lift hill just about in this photo. The boats left the exit station, turned to the right, went up this hill and straight into the loading station....you can also see the doorway you would have looked through.
The maintenance area was rather simple. I can't remeber how many boats it would fit, but it was to the right just after you passed the woman getting water poured over her head. You could move part of rhe metal guide channel out the way to direct boats into this area. There was a small crane to remove the boats out the water and out of the channel. This area was immediately behind the doorway you can see from the train.