A cable installation assembly includes a connector, a power wire, a ground wire and two signal wires. The connector includes a base, having a plurality of terminal containing grooves formed in the base and arranged separately adjacent to each other. The power wire includes a power core and a power terminal electrically coupled to power core, and each power terminal is plugged into each corresponding terminal containing groove. The ground wire includes a grounding core and a grounding terminal electrically coupled to the grounding core and plugged into the terminal containing groove. The signal wire includes a signal core and a signal terminal electrically coupled to signal core, and the two signal terminals are plugged into the terminal containing grooves respectively and not arranged adjacent to each other, so that signals can be transmitted without interfering with one another.