The only difference between the 568A and 568B is which pins the orange and green pairs are connected too. You can use either the A or B as long as both ends are connected the same. Many jacks have wiring diagrams for both but patch panels often only show either A or B. I always connect the jacks using B. If you connect the jacks B and the patch panel you get only has marking for A just connect the orange pair tot the green terminals and the green to the orange thermals. I would highly recommend you get a basic tester for network wiring to verify yo have connected everything correctly. It is very easy to accidentally reverse a wire connection.
I also recommend you follow Hal’s advice and use (2) 6 wire jacks for the voice lines. I usually connect the brown pair to the second jack so each jack has 2 pairs.
I stopped using 66 blocks several years ago and only use 110 blocks for the voice lines. I find the 110 blocks much easier to wire especially if you are using CAT-5.
