Connector Header Through Hole 2 positions

What is the purpose of the 4-pin Molex connector?

Molex is a leading supplier of complete Electronic connectors products. Molex's team of highly skilled employees is committed to the design, development and distribution of innovative product solutions that are closely related to people's lives. The company has more than 100,000 reliable products, among the world's largest products, including electronic, Cable Connectors I/O Connectors,electrical and fiber optic interconnection solutions, switches and application tools.
Molex uses extensive global resources to meet customer needs locally, regionally and globally. Molex has mature and developed sales, product development, manufacturing and logistics resources in Asia, Europe and the Americas. Molex's engineering, development and manufacturing capabilities are divided into three product divisions, originality electronics  IC ,Electronic Resistor and Capacitor and Etc, all served by Molex's global sales and marketing organization.