Tis connector tip's female side looks like this:
How to use this connector tip? This connector's rear is a 5.5 x 2.5mm female jack:

It can plug to a 5.5 x 2.5mm connector to form a new size connector:

Above pictures are just for understanding how the connector tip works. Actual connector tip may be different from the connector tip shown in pictures.
Important Note*: If your original connector is not a 5.5 x 2.5mm connector, you can not use this connector plug tip.If you are using this connector tip with some of universal batteries or power adapters, you need to find the 5.5 x 2.5mm standard connector tip that comes with the batteries or power adapters first, and plug it onto the battery or power adapter output cord, to form a standard 5.5 x 2.5mm connector, then
plug this connector tip to the 5.5 x 2.5mm connector to form a new size connector.
Important: This Connector Does Not Convert Voltage
This is a connector adapter only. It does not contain electronics to increase, decrease, or regulate voltage.
Before connecting your equipment, make sure the output voltage, polarity, and available current from your battery or power adapter are compatible with the device you want to power.