The interviewer would like to see that you are planning to make this move, a long-term career move. Tell the hiring manager if you are looking for a long-term fit, and why you think their company would keep you around for years to come. If you have strong tenure in your work history, be sure to lean on that.
"If hired, I would like to work for you as long as possible. I am a very loyal employee and know that once I find the right fit, I am going to stay long term. You can also see from my resume that I have strong tenure in my other roles."
"This is the start of my career as an electrical technician, and I plan to stay here for a very long time. Training and onboarding is a time consuming and expensive effort, so I fully understand the importance of loyalty."
"As you will see on my resume, I have strong tenure with my previous roles. I am loyal and remain in my positions as long as possible. My last move was only because the company closed down. I would have stayed much longer if given the opportunity. I also plan to help you with employee retention by acting as a mentor to new technicians. I love to share my knowledge."