I need to move the existing power over to where the hole is in the image. There was a strip light and I’m replacing with a single light. The blue box is anchored to the frame. The cable is too short to feed over. *I’ll be adding a wood finish to the wall, so the light fitting will anchor on that.
Is there an product that allows one to join electric cables - so that I can make the line longer to fit? Should I remove the blue box and get something else to use on the wall?