Like everything Italian, it is never simple to solve. Again I will stress that providing sources is quite helpful
Taken at face value, Le operazioni in Sicilia e in Calabria lists 12 R.M. armored trains (TA):
-Two in the d.cos. 207º (p. 504)
-One with Difesa Porto «E» - Catania (p. 507)
-One with the Piazza Militare Marittima Augusta-Siracusa (p.512)
-Eight listed as "8 Treni armati in totale" (p. 513)
However, further reading indicates that the number of eight is inclusive of all the TA listed in the OOB.
Footnote 24 on p. 86 states/lists only eight TA (see below).
TA 76/II/T is mention in Sicilia on p. 144.
TA 102/I/T is mention in Sicilia on p. 171.
Gli autoveicoli da combattimento dell'Esercito Italiano vol 2 list 12 total R.M. TA and their locations (p. 560). According to this list, 9 of the TA were in Sicilia.
Here is a comparison of the two lists:
Sicilia (from fn 24)
76-I-T (Porto Empedocle)
76-II-T (Licata)
76-III-T (Mazzara del Vallo)
102-I-T (Targia)
120-III-S (Porto Empedocle)
120-IV-S (Catania)
152-I-T (Termini Imerese)
152-II-T (Carini)
Gli autoveicoli (Italicized units not in Sicilia)
76-I-T (Porto Empedocle)
76-II-T (Porto Empedocle)
76-III-T (Mazzara del Vallo)
102-I-T (Targia)
120-I-T (Targia)
120-I-S (Siderno Marina - Reggio Calabria)
120-IV-S (Catania)
152-I-T (Termini Imerese)
152-II-T (Carini)
152-III-T (Carini)
152-IV-T (Albissola - Savona)
152-V-T (Voltre - Genova)
The TA with 76mm and the 102mm guns match. The numbering of one of the 120mm TA and its location are different. One 152mm TA is added by Gli autoveicoli.
v/r Jeff