I genuinely find the diagrams confusing and I've got 8 wires that need to fit into 6 holes so I thought I'd be best to ask than risking it and damaging anything.
you have 6 wires to go into 6 holes, you dont need connecters, you divert the other two wires from one lampholer of one tube over to the lampholder of the other tube, most lampholders you will find have two twin terminals allowing in and out to each pin if needbe
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