OK.
CT
Supplement 10: The Solomani Rim (1982) has almost no in-text discussion of the capitals, but the subsector data tables are all consistent with my recommendations.
CT
Alien Module 6: Solomani (1986) has even less in-text discussion, and the data tables use a cumbersome cross-reference to show subsector capitals. If you work through that, the capitals are consistent with Supplement 10, except for this slight discrepancy: the “Solomani Rim Data” table has Lagash as the capital of Sol Subsector (consistent with Supplement 10), while “World Index” table has Terra.
Mongoose Traveller: Solomani Rim (2012) also agrees with S10, and is the best source of in-text discussion of the capitals, giving explicit discussions of all capitals except Eleusis (2109) and Jael (2821).
You didn't mention
GURPS Traveller: Rim of Fire (2000) as a viable source, but the subsector capitals agree with CT S10. The book has good in-text discussions of most of the capitals, including Jael.
Looking through all of these sources, table references support reverting all the subsector capitals, and explicit in-text references support reverting all capitals except Eleusis (2109), where the support is oblique at best.
Here are the page references for the recommended reversions:
- Ultima (Subsector A): Thamber (0704 A554898-C). See CTS10 p8 (table), MGT: SR p46.
- Suleiman (Subsector B): Suleiman (1504 AA6598B-E). See CTS10 p10 (table), MGT: SR p53-54.
- Concord (Subsector C): Eleusis (2109 A789831-D). See CTS10 p12 (table), MGT: SR p55 (oblique), GT RoF 77 (oblique).
- Banasdan (Subsector H): Banasdan (2920 A653A54-F). See CTS10 p22 (table), MGT: SR p78.
- Albadawi (Subsector I): Gaea (0722 A986986-E). See CTS10 p26 (table), MGT: SR p83.
- Sol (Subsector K): Lagash (2121 A667A8B-F). See CTS10 p30 (table), MGT: SR p14, 89, CT Adventure 13 Signal GK p33.
- Arcturus (Subsector L): Jael (2821 A55789A-C). See CTS10 p32 (table), MGT: SR pCT Adventure 13 Signal GK p33, GT: RoF p113.