You can not actually build a wire what you have to do for example in the mission where you have to clear the starlight drive in for preston walk up to the beacon make sure you have a generator so anyway walk up to the beacon and press the interaction button for example triangle and then bring the wire to the generator and press triangle

You can not actually build a wire. What you have to do, for example, in the mission where you have to clear the starlight drive, for Preston, walk up to the beacon and make sure you have a generator. Walk up to the beacon and press the interaction button and then bring the wire to the generator and press triangle.