Are you saying a electrical butt splice is good enough to hold the rigging on your sailboat? I don't think they crimped those splices or ends on your standing rigging with just a simple pair of pliers and the pressure you can develop with one hand squeeze. And for certain they were not electrical connectors.
The OP's question was specifically about electrical connectors as the splice connector. If you are recommending the stuff used for boat rigging then maybe it's not apparent in your post. And I don't know of any sail boat rigging that is as small a diameter as shift or brake cable.
I don't think any of us doubt that you can't splice them successfully with splices or connectors made for the purpose. But again, that's not what the OP ask.
Last edited by Iride01; 09-20-23 at 02:23 PM.