We have created a "Harness Manufacturing Standards' document to cover these types of items. We have the connector number written directly on the connector, so in the document we make a requirement that it should be done with permanent maker. I would think, that you might be able to do the same with the labels and in the document have what information should be on each label and it's location in relation to the connector. The same could be done for the harness label, although placement may be diffuclt unless maybe yopu start with the first numbered connector. Hope this helps.