When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The docking hardware in the picture you posted is for the detachable Tour-Pak and/or detachable luggage rack.
The detachable sissy bar upright/backrest requires the addition of a second set of docking hardware closer to the seat. Look at the photo below. It clearly shows the hardware you have (indicated by the number 2) and the hardware you need (indicated by the number 1).
Part number is 53803-06 is for the detachable backrest and it's on page 342 in the 2013 Parts & Accessories Catalog.
I have all three -- detachable Tour-Pak, detachable luggage rack, and detachable backrest. So I'm somewhat familiar with this setup having installed all four docking points (i.e., both sets of hardware) on my bike.
Bear in mind this is for pre-2009 bikes. 2009 and later use the upper shock absorber bolt as a docking point. It's a whole different docking system.
Thanks RP1981. Mine is a 2008. I knew I couldn't be right. You gave me the exact info I needed. Thanks everyone for there input and time.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.