When the RCD neutral terminal is about the remaining, move RCD to the left and reconnect power cables. This way you may even now be capable of utilize the busbar. From the bottom of RCD run a cable to the neutral bar. We should have two outgoing cables (twin core https://emergency-electrician-ser96845.getblogs.net/67862070/5-tips-about-signs-you-need-an-eicr-you-can-use-today