I used the ones I had to make the connections to the head unit harness and the new HU I installed.

Convenient for Power and ground connections, or for the harness Speaker leads, to use factory Speaker wiring.

Overkill? yes, specially with tiny 18 gauge wires from the HU. I had extras and I simply decided to use them.

Another neat thing is that I cut some in half, and they can be used as independent connectors, they have polarity indicators, and I used pos and neg when it applied.

Connecting and disconnecting them is very smooth and secure, no struggles or fear to rip or break the wire. The ribbed areas makes it easier or gives confidence to hold and pull from those areas. Everything is working fine even the steering wheel control adapter. And they can be re used again.