I have a love hate relationship with holtites. Mill-max are mechanically better but they sit higher. Currently using holtites because they can sit flat on the PCB. I solder them in using the technique below.
- Put sockets on sim card remover tool that comes with phones
- Using a paint brush dab a TINY micro amount of solder paste onto the sides of the sockets (don’t need much to get the job done)
- Transfer the sockets onto the PCB (make sure to push them down) so they are flat to the board (sometimes I use a washer to assist with this)
- Touch the soldering iron on top for couple of seconds to solder everything together.
If the PCB holes are too large I fall back to the video @Deadeye posted that helps to reduce the diameter. It doesn’t happen often but if the board is too tight you can using the soldering iron tip to push it in.
https://www.digikey.com/en/products/detail/te-connectivity-amp-connectors/8134-HC-8P3/1151726