I have to access the 'small' part of soldered header pins. Female jumpers cannot be placed there as the small part is too small. So i thought extending the small part of the header pins so they can fit inside a female jumper.

So i removed the metal part of a header pin and tried to solder it with the small part (the bottom part) of the pin header.

It was really difficult to solder with only two hands, but i managed to do it.
The thing is, it has broken two times already. It is too weak. I cannot do it again, only for the frustration it will break again.

So what is the best way to extend a header pin?