Separately, the Wall Street Journal reported that Ethiopia wanted to send the flight-data and cockpit-voice recorders to the U.K., causing U.S. investigators to hold intense behind-the-scenes talks to bring the parts to America.

参考译文：另外，“华尔街日报”报道说，埃塞俄比亚希望将飞行数据和驾驶舱语音记录器发送到英国，这使得美国调查人员举行了激烈的幕后谈判，以便将这些部件带到美国。

你的理解是正确的

(1)to hold intense behind-the-scenes talks to bring the parts to America.作U.S investigators的宾语补足语（cause sb to do sth结构）

(2) to bring the parts to America作前面动词不定式to hold...的“目的状语”