Soldering vibrate switch on new power flex cable?

For all the tutorials this website has, I was surprised there was not a tutorial on how to replace the power/volume/mute flex cable on an iPhone 7 Plus.

I figured it would be pretty straight forward until I received the replacement cable today and realized the vibrate/silent switch was not included and will require soldering to be transferred to the new cable.

Does anyone have recommendations on how to do this properly?

Thank you.