Satellite Knuckles appear along with Satellite Daggers at the Southeast corner of H-8 on the map. There is a small tower there. You can pull the Animated Knuckles around to the "safe side" of the tower and fight them there. This is also where Count Raum pops. Alot of people camp here (or at least did camp there) for Count Raum as well as the many Kindred Monks, Ninja, Thiefs, and Rangers that pop there and can be procced with Job Abilities.
The larger tower next to it has a platform with two ??? on it. The south ??? is where you pop the Animated Knuckles. You can safely fight the Animated Knuckles right on the platform. There is no need to pull them anywhere.
I did it as a Nin/Dnc along with a Whm/Rdm and the fight was a joke. I don't know if the Fragment is 100% but I went 1/1. I am on the last trial for Spharai now (10x Animated Knuckles) so I guess I'll find out if the drop is 100% or not soon enough.
As far as dynamis info goes, BGwiki has very good up-to-date information on Neo-Dynamis.
Dynamis-Xarcabard page is here: http://wiki.bluegartr.com/bg/Dynamis_-_Xarcabard
The map is here: http://wiki.bluegartr.com/bg/File:Dynamis-Xarcabard-NMs.gif