Connecting the Boolean Board to a Pioneer Kit

I have had questions on this.  The Boolean Board has four eight pin connetors while  on the Poineer board
JI is 1 x 8
J2 is 2 x 9
J3 is 1 x 10
J4 is 1 x 8

Four eight pin connectors were used  on the booleen board to lower cost of inventory and it is set up that the J1s and the J4 connect pin for pin with the Pioneer board.. 

J3 will have two pins empty while J2 will have one outter pin and all the inner pins empty.

Hope that helps!.