endsplice tool

Hat shaped endcaps are used to endcap wires and often to splice databusses together on avionic racks.
The tool we use for this is the AMP 48208 crimptool
hat shaped endcaps

Here's a few databusses and other wires that were tied together using hat shaped endcaps.
databusses

So let's crimp them on some wires.
crimping a hat shaped endcap

Stick some wires in the endcap.
crimping endcaps

And crimp it.
crimping

And here's the finished crimp.
finished crimp

Easy right? we use the large opening for the big endcap and the small opening for the small endcap.
small endcap