2) an intermediate connector disposed on a support, such as, the bracket-side joint structure should be matched to the joint, and the mounting location and environment adaptation.
2) If the middle joint is arranged on the bracket, the structure of the side joint bracket should match the joint, and adapt to the place and environment being installed.
2) If the intermediate joint is arranged on the support, the structural form of the side joint support shall match with the joint and adapt to the installation site and environment.