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The form has two input fields available. The combo box at the top is for selecting the available Haystack connection. The filter at the bottom is for specifying which elementrecords(s) in FINStack to update down in Niagara. For instance if I filled out the filter with (point and equipRef->vav) then all the points that are under a vav equip will sync their tags down through the connector that is selected and into Niagara.
Say a Haystack point is given the tags "foo" and "bar".
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Then the specified point gets updated in Niagara in terms of its tags.