Problem blinds don’t always need to be repaired, however. If a blind is simply backwards, you and remove it and then reattach it in the correct position.
The poll the blades are attached to is hollow inside. The carrier body found inside the poll, pressed against the right side.
You can ask a worker at a hardware store to help you identify the correct stem if you’re confused.
Once the stem is replaced, you can reattach the blind and spacer chain.