The image above is how Blue Sea would have the connections Without the Cyrix-ct connected.
Here is a 4 pole setup, but I need a schema for a 3 pole where the #2 Pole originally had the output to the fuse box and busbar. There is a Pole #1 and a middle pole of {#1 & #2}combined. I have the Cyrix connected between the positive terminals of the starter and house batteries. Thanks all. 
Presuming that you just want to parallel the batteries manually - if the cytrix is off
Edited (Modified drawing) Be carefull to NEVER turn the switch off with motor running or move the alternator wire off the common and put it on bat one otherwise the alternator may damage the loads
The switch should ALWAYS be on Bat 1 or Bat 2 or BOTH NEVER OFF when motor is running as thats the circuit thats supplying the loads and the charge to the default battery selected
