Yes all the red wires from each battery thru the Red Covered bus bar are the same length. The black wires from each battery to the shunt then on to the black covered bus bar are the same length. They are not the same length as the red wires but that does not matter.Nice write up.
Of course it makes no difference that the wires from the solar panels to the SCC are equal. But, it is important that the wires from each of your parallel batteries to the busbar are equal in length.
Safe to assume that is the case ?