独立主格结构还是省略结构

Assumingthe hotel man was bought off, their only chance—a slim one—lay in removing thecar quickly; if it could be got north, to one of the big cities where the NewOrleans tragedy and search would be unknown, repairs could be made quietly, theincriminating evidence removed.

谢谢各位大咖专家老师们！

黑体部分为独立主格结构作结果状语。假如在黑体部分前加上and，则后面剖析为并列句的省略（省略了could be)。