Here's Ballot Box Scotland's chart of the transfers in Motherwell South East & Ravenscraig:
That's a very strong Con -> Lab transfer rate.
Yes, though not unusual. My rule of thumb for Con transfers when there’s only Lab and SNP left is that only a handful go SNP and the rest split roughly evenly between Lab and non-transferable, which is pretty much what happened here.
It’s also a noticeably poor first preference total for the Tories: if there were a full four seat STV election with those first preferences you’d expect them to lose their seat.
To what extent do Tories bother preferencing at all? Would there be a chunk of them who would only vote Tory and then not bother to preference anyone else because they regard all other parties as equally bad (from their perspective)?