Yes, those do correspond to the units/neurons in the hidden layer(s), so H11 is the first unit in the first hidden layer, and so on. You can have those dropped from the data exported from the Neural Network node by setting the Hidden Units property (in the Score section) to No. Or if you want them in there but not used by StatExplore, you can set Use=No for those variables from the Variables property of StatExplore.
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