Methods, systems, and apparatuses are presented for improved satellite communications. The first, second, third and fourth guide members are located such that when a carriage moves rightward, the second contact surface and the fourth contact surface contact each other and after this, the first contact surface and the third contact surface contact each other. By increasing the ease of detent entrance into the member to be joined, a positive, yet easily releasable lock is provided between the members. The position regulation member is provided to face at least one side surface of a wire located at an end of the wires in the arrangement direction.