You will need enlarge the hole in the bottom of the adapter. A dremmel with a small cylindrical grinding stone will make short work of this. To use this without dissasembling the sync cable a simple zip tie will keep the tabs pressed in and allow the nano to slide in and our easily.
I passed the cable through the adapter, attached the nano and slid it into the adapter. This will allow glueing the sync cable in place. It looks kinda getto becuase I used the remains of the zip ties to glue everything together.