Now that you have told us (approximately) what power supplies you are using I can probably help. I have a few of these. I have found the part number of the high current edge connector and bought a few. I even have some data sheets! Just give me a day to dig out the information from my "filing system"... If you can't wait, the clue is that they are made by Murata who DO publish data. They are designed to be operated in parallel with no external components (as long as all the parallel PSUs are the same model and power rating). They have an internal trimpot that can be used to tweak the output voltage slightly.
John