NSBU is relatively easy to install. The hardest part is removing the connectors, which are held in place with some sort of non-hardening substance to protect the metal connectors from moisture, which makes sense. If you apply a steady, slow but strong pull, it will slowly slip off. Do not use a screwdriver or similar tool to cut. The substance inside is very flexible and the impact action can damage the connectors as the connector bounces and then rebounds. Therefore, a strong, steady, and slow