Going through the tutorials for the West Cornwall Route Locos both tutorials refer to documentation for more detailed information on the loco. Documentation does not appear to be accessible on Dovetail or Steam. Would especially appreciate loco specific information regarding safety systems, quirks, etc.
Don't hold your breath, there are no manuals for Munich-Augsburg, Clinchfield, Hamburg-Lubeck, Cathcart Circle or any of the rush hour routes, all released before West Cornwall. You might be lucky, as it's a route created by Rivet they could release a manual sooner than the DTG routes.
It's on the DLC's Store Page. I don't know where they are located elsewhere. I've also done a Route Guide [mainly Map section only] if you're also interested in checking that out. https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:335c57a9-f83b-42dc-a65b-4ff095340fbb
There is manual, you get through the "normal" but not so clear form the DLC page. Here is a direct link: https://cdn.cloudflare.steamstatic...._Cornwall_Local_Manual_PC_EN.pdf?t=1636116320