In D1300007 CB-3 is placed on the -Y side of the TMSX upper structure.  Betsy had moved the bracket, but after looking at the test stand today, I asked Jeff to install it in the original location.

When I look up D1300007, Betsy has a redline drawing, and placed the bracket on the +X side of the TMS upper structure, but this is not accessible from below the upper structure once the ISC table/telescope is in place.  Betsy's redline only claimed interference with the test stand, and there is no test stand interference for CB-3's original location.  Maybe Betsy's redline drawing didn't fully explain her thinking.  I sent her a text but didn't hear back.

Late today, after installing the safety support beams on TMS, it's clear that the real issue with the original placement of CB-3 is that there is only about 6" to access the bracket  from below, and access is between the telescope safety support beams (only 18" apart) - difficult and a risk to TMS.  

If the bracket must stay on the -Y side of the upper structure, my only suggestion is that moving CB-3 toward the QUAD cable brackets might allow slightly better access.  Alternatively, maybe the +X side of the upper structure can be accessed through the structure, so would work?  Either way, an alternative placement should be considered before bringing the TMS telescope under the ISI.