Why did someone splice into this IGN. 1 lead?

I will say I really like the open barrel terminals now that I've been using them.
When crimped they really hold the wire well and support the insulation.
PS. Steve. I found the nifty Astro interchangeable jaw crimper wasn't up to the task on some heavy ring terminals I'm using. The American wire copies of the packard crimper worked far easier. I only soldered that one repair in the photo because the wire strands had some damage. If there was any slack in the harness I would have cut it back. But I didn't want to strain it. Other option was to splice in a length of wire. 6 to one 1/2 dozen the other IMO