Happy New Year and welcome to NICOclub! The staff here is thrilled to have you as a new member of the Armada Forum!
Here is the issue, yes you have a Bose system, but the Bose System on the SV is different then on the other model. I am pretty certain that the Bose system in your SV will NOT have the plug for the DVD player. The DVD system is not available as an option on the SV..........only SL and standard on the Platinum. You can check the Factory Service Manual here to confirm without having to physically pull everything apart:
http://www.nicoclub.com/FSM/armada/
Now, even if the harness is not there, you can still get an AV person to install the overhead monitor so that it all works with the factory head unit, it is certainly possible, but not nearly as simple.
You will certainly enjoy the Armada, it is an awesome ride!!!!!