I wonder how many people here believe in balancing :)... And how many believe in it so much that have to use method #3 or 4. Few are using method #2 though.
Voltage sense wires should be connected as close to the bank as possible, therefore - directly to the terminal is better than to the buss. Doesn't matter to what pair of terminals.
Temp sensor will read most correctly if attached to the terminal also. Again, doesn't matter to what terminal.
Btw, check photos of Roy's battery box. Pretty smart arrangement, with switches right there inside, on the box ledge. He posted plenty of OEM pics today but didn't post his work pics, and I forgot where I saw them here.