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The low angle makes it difficult to see the attachment point. If you see a single female threaded connection, this rack is for you. Otherwise, you have the earlier original type of attachment.
+1 on the uploading. The newer style rack attachment uses a threaded stud approximately 2-½ to 3" long. You run the stud in until it bottoms out, then you place the rack tower over the stud and use a special "winged" type nut to cinch it down. All-in-all, pretty fast once you know the setup.