tie in with造句

Where does this line tie in with the main circuit?
这条线在哪里跟主线路连接在一起呢 ?

The police found a fact that might tie in with the murder case.
警察发现一桩可能与凶案有关的事实.

How does this tie in with the twelve information centers?
如何与这十二个信息中心绑定连接?