Brain tease: What connects these three 45s?

[Dayo]

A deliberately cryptic thread but I know that there are some very smart soul fans out there, so - if I've set this correctly (and I'm trusting my own memory here) - I'm sure someone will supply the answers in a heartbeat.  

Just a bit of fun:

What connects these three discs and (I'm pretty sure) there are two missing ones - what are they?

Sweet Darling - Jimmy Soul Clark

Key To My Happiness - The Charades

Take Me Home - Donna King

 

Edited November 3, 2015 by Dayo

[Dayo]

I guess it was kind of obscure, but didn't Dave Godin reveal the mentioned discs as his secret sounds in his swan song column for Blues & Soul? Hope my memory is serving me correctly....