That was an error left in when creating the campaign. Basically, it was going to be a series of three unique control panels with based and unbased variants. I did not feel like they were worth it, so I scratched the expansion (hence why there are no images).
These have since been integrated into the first stretch goal and are now available to all backers of the Master Chief pledge level and above.
I apologise for the mistake.
To additionally clarified, this is NOT the Bridge Add On set.