I'm like 95% sure that To Subsidiary doesn't correspond with the Due/To From Subsidiary field on Advanced Interco JEs. I'm fairly sure that field is the header field that you can use in some instances to do some interco magic using a regular JE.
Much to my consternation when also looking for that in the past, the Due/To From Sub doesn't appear to be exposed anywhere. Not in search, not in reporting, not in Analytics WBs. I'm not even sure it's exposed in ODBC, though I haven't looked for a while.
I'd love to be wrong if someone knows of it being available somewhere.