Where was the Shady Springs Connector going to connect to? US 19 south of Beckley can be an absolute slog.
I don't believe I ever saw a specific route planned, although the discussions talked about a connector as well so I'm assuming its's not at an existing crossing of the Turnpike. Something that left US 19 right by the WV 3 intersection and followed Whitby Road and Left Fork Beaver Creek over to the Turnpike would seem to make sense.
Indeed, there was never any EIS routes developed for the Shady Spring Connector. The state Legislature required that the Parkways Authority complete a study of the new interchange during the planning of the (now completed) widening, as a condition of the state granting additional bonding authority back in 2004. Two years later, after the Parkways Authority dragged its heels on the Shady Spring Connector study and frittered away at the widening project, the Legislature took out the Shady Spring Connector mandate and put a lid on future sale of bonds for the widening project. However, it looks like the Parkways Authority has archived the data collected by Howard Needles Tammen and Bergendoff (HNTB).
You might be able to contact them to see if a copy of the project overview is available for viewing. However, such information probably cannot be released to the public because in West Virginia any proposed highway right-of-way will lock up the affected properties with respect to the State not being responsible for the cost of acquisition of new structures built after the proposed right-of-way becoming public.
https://www.register-herald.com/news/local_news/turnpike-may-archive-shady-spring-interchange-data/article_3ed5e68a-15f5-5bf9-adad-58bc101b93c5.html