You can check the timings of these 3 trains. None of them has sufficient turn around at JBP to undergo PM. Earlier all 4 rakes has PM @ HBJ because of RSA with HBJ Intercity but since that has extended to ADTL so that has its own dedicated rake. All trains are of WCR and neither SGRL nor AMBK are in WCR. So that only leaves Rewa as the base for all 3 Rakes. You can also verify this by looking at TB of Rewa Intercity. Currently JBP-SGRL is not running but whenever it starts this is going to be the RSA structure.