Using my HCR32 Series II MAF for this example:
using a small flathead screwdriver, pry out the black rubberized silicone and pop off the plastic lid.
Remove the brass metal plate from the MAF.
These are the x3 connections you are looking to resolder if they need it.
* Assemble it in the reverse order, then using Ultra copper gasket maker, reseal the lid and let dry/cure.
* Clean the MAF out using a Airflow sensor Safe cleaner!
* Install maf back onto car, Aifilter, etc and plug in connector & Done!