Good Morning SMB66X,
It is noted that these 2 buses - SMB5001A and SMB5002Y were seen running as Training Buses from Woodlands Bus Park (WPDEP). This deployment is made some 2 months back.
However, for now, I can just say that these 2 buses are Training Bus perm, as I've seen them quite often (every Saturdays) doing training runs rather than appearing on any service or depot transfer elsewhere. This is for those BCs intending to drive the double-deckers, on which the roll-out of such double-deckers are ongoing.
You can find these 2 buses running along Woodlands Dr 50 (888 Plaza) -> Woodlands Ave 4 area, all the way down to the Woodlands Bus Park (WPDEP) as their regular training route every Saturday afternoon.
I have transferred my replies to your talk page. Hope this clarifies. Thanks.