I am using FT8 and only thing you need is a USB cable (shielded and ferrite recommended). BEsides that for FT8 WSJTX or JTDX. You will need to install de virtual com driver. You don't need the signal link stuff!! The radio have its own sound card. Please check Video at YouTube about FT8 and Yaesu FT10DX. Not complicate what is more simple.
Many thanks to Rob Sherwood (NC0B) who shares his recent assessment of the new Yaesu FTDX10