Micro Pressure - Connection

I’ve set up the micro pressure sensor to check co2 pressure but have a problem.

I can’t find how to connect a hose to the tiny stem. I got a silicone pipe and the smallest ear clamps I could find but it doesn’t work and co2 leaks from it.

Anyone know how to get a good connection to this? Or how a wider barbed connection could be added to the stem?

I was going through this wiki page: SparkFun Qwiic MicroPressure Hookup Guide - SparkFun Learn
It says about uxcell Pneumatic Hose 4mm OD 2.5mm

Use a 2.5mm hose as mentioned above and maybe use picture hanging wire or similar to clamp it down (you encircle the stem and twist the wire until very tight)