not sure where they come from is it ok practice to use connector block and ins tape or is there better method thanks
Would be better to get rid of it from where it comes from. Can't use tape or connector blocks in a wall, not good practise. Maybe crimp them off in a box. I'm sure you'll recieve many answers.
Agrre with young Ant here, try and find the origin or a more suitable point to cap off the unwanted (?) live cables..