The one in front of the basket is for a suction measurement. There is also one on the other side of the basket but in the volute (return pipe connection) of the pump. You can get pressure gauges at Lowes and other places like this one:
It may be a tight fit between the basket and the pumps so you may need and extension line. 1/4" male one one side and female on the other side of the tubing. Like these:
Also, many autoparts stores will carry dual gauges that can measure vacuum and pressure albeit at different times. This may also need similar adapters to fit the drain plug.
With the jets removed, pressure should be about 8 PSI and vacuum about 18 in-hg.
Again, a picture of the pad equipment might be helpful to spot any issue with the setup.