How to hang two company brands?

How to hang two company brands? The two signs of the company must have a main card and a secondary card. The main card is usually hung on the right side of the gate. Usually hung on the right. We have the habit of reading from the left (vertically). The left side should be hung on the right side of the entrance door. The main signs are hung on the company's position, whether standing indoors or on the left, or looking from the outside.