Where to place your Higginson / "in line pump" close to the nozzle , when giving a enema to wife (not often ) I hold in my right hand the bulb in the palm of the hand and the nozzle between two fingers of same hand , she feels my hand / fingers against her anus and me too , so I can also feel when she is clenching her anal muscle , best choicest instant to squeeze the bulb .
Another option when doing solo is to have the bulb under one of your knees , so you can squeeze hand free and use your hands for what you like the most .
Connectors are cheap and easy to use , you can buy connectors and adjustable clamps in car parts shop or in a motor boat part shop , the prices will be different as in a adult toys shop .
Looking for a flowmeter easy look in computer shops / tuning your computer / water cooling .
You can adjust the flow by adjusting the elevation of the bag / can / bottle ;
the medical reference is 16" ( 1.3 feet ) above your belly button for a hose of 5/16 inch
A advantage to use a Higginson is there are two check valves , so the flow can't never go back to the bag - can - bottle
If using a double balloon enema (mandatory) or other nozzle is very easy and comfortable to can disconnect the nozzle from the irrigation system , for this you need one clamp for the nozzle side and one for the Higginson / bag side .