I was having issues with my EP350 and have got a new board from Axiom to put in it. There's only two leads that need to be attached when reassembling and I didn't think to make note of which color went to which screw prior to sending back my old board. Is there a way I can tell how this should be hooked up or is there potential for damage if I hook it up backwards?

connections
board

Nothing color coded or + or - on the board possibly?

On the board where the white white wire is it says 3+4=R and the blue wire says 5+6=L

The regular speakers have two different sized connectors. Can't go wrong. Surprised the subs aren't the same.