To make a T type direction change you should use a KBA40ABT4 / KBB40ABT4-44 central power supply (W for the white-painted version).
The horizontal link of the T is obtained by the direct connection of two straight lengths.
The perpendicular link is obtained by connecting a cable between the central power supply and the supply unit of the perpendicular KBA/KBB line.
The horizontal link of the T is obtained by the direct connection of two straight lengths.
The perpendicular link is obtained by connecting a cable between the central power supply and the supply unit of the perpendicular KBA/KBB line.