It's not difficult to do. I managed to do it, just as an experiment when I had an engine on the stand. I was practising for when I had do it on the engine in the vehicle.
I just took a set of needle nose vice-grips and gently clamped it on to the dipstick tube holder part. I then took some haywire and attached it to the vice-grips. That way, even if I dropped it into the oil pan, I could easily retrieve it. The rest was a breeze.
Beware: there are two alignment notches on the piece.
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Note which notch it uses, so when you go to put it back together...
If you get it wrong, your dipstick holder tube won't line up with the dipstick tube holder.
I used brake cleaner to clean off the parts, and I like to use a skiff of RTV where the o-ring makes contact. I hate oil leaks, and I hate re-doing stuff.
Good luck!