XL series of connection boxes ,three are three specifications : 36 terminal、24 terminal\12 terminal, each specification includes A、B、C、D four kinds of types .
A type：the bus and branch are the same side，the branch is cable：
B type：the bus and branch are the same side，the branch is cable；
C type：the bus and branch are opposite，the branch is cable；
D type：the bus and branch are opposite，the branch is cable
