I am back.
Finally I got the fuses and a big thank you for the support. It worked! I was able to measure the current and voltage at the same time

Another issue though. I tried measuring the current alone by connecting A to the positive of the battery where the positive of the charger connects and connecting C negative of the battery where the negative of the charger connects. There were sparks and the fuse was blown.
How do I measure current alone. If you want I can show off the CAD skills again!!