ends, cables
No podemos dejar cabos sueltos.
We can't leave any loose ends.
Al oírlo, até cabos.
Upon hearing it, I put two and two together.
Íbamos a juntar los cabos sueltos.
We were going to tie up the loose ends.
— La cinta blanca (2009)
Atar los cabos sueltos.
Tie up loose ends.
— El club de la lucha (1999)