BRC/WR is unlikely to provide WAP5/WAP7 links for this train.
Reasons :-
1. 12833/34 is owned and maintained by SER.
2. SRC ETS isn't equipped to maintain a 3-phase locomotive (neither WAP5 nor WAP7). If, by chance, a 3-phase loco hauls this train as off-link, it'll be sent to HWH (ER) for maintenance :P.