As far as the primary is concerned if it is a centre tapped winding at 115v then it would not matter if you went from blk to red or red to yellow for the 115v input.
In any case hook up the primary first and check the secondary ac voltage on blu to blu and grn to grn if they are the same voltage on each they can be paralled up for double current rating, the only thing is they have to be phased right, they may have a marking on one blu and one of the grn wires.
The AC voltage you are getting on the secondary will be mulitplied by 1.414. -1.2v for a DC bridge rectifier supply with capacitance smoothing.
If you need help phasing the secondaries more help can be given, if the secondaries are different voltages then you cannot parallel them.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.