I recently purchased a optima yellowtop battery from my 2013 Passat VR6. It has a smaller foot print, but I found that I could not screw in the hold down bracket as, although there is a hole in the right location, there is no captive nut for me to screw into. I took a picture of the underside of the battery tray.Local VW parts department and autoparts store was no help. I found captive nuts at the local home box store, but the plastic is way too hard for me to hammer them in. I'd like to obtain the metal piece at the top left, which has the captive nut. Any ideas? Thanks.