Converting ROTH to Traditional then to Solo 401K Plausible?

[Stephen Aki]

So, I've been searching for how I get my current investments into a Solo 401k. After doing some digging I found that I cannot roll my current ROTH into a solo 401k. I believe I can roll it into a traditional IRA which should then allow me to roll it into a solo 401k. This is rather maddening as every single search comes up with the opposite i.e. traditional IRA to ROTH! Even when the headline says ROTH to Traditional when you start to read the article it is the other way around!

Where do I find info on doing what I want to do and, is it even possible to do this?  I have money tied up in a ROTH that would be better served in 1031 exchanges.  I have searched on the IRS website but, typical government entity, I can't quite find what I am looking for. Any recommendations on where to find the info would be appreciated.