Many photos of the Neutron Star Interior Composition ExploreR (NICER) show it partially obscured by an object which looks like a golden orb on a poll. What is this object?

Attempted Solution
Zooming in on a high resolution image of the whole station, I think this is a "T" shaped object, viewed from the side.

If so, it would appear to be on the P1 truss.

However, I cannot find a diagram with this object labeled.