https://www.researchgate.net/figure/Diagram-of-observed-stal...

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Note added at   57 min (2024-04-03 16:51:52 GMT)
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or
tether with chain


https://www.kerbl.co.uk/en/product/cattle-tether-with-chain-...

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Note added at   1 godz. (2024-04-03 16:55:00 GMT)
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attacco = attachment

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Note added at   1 godz. (2024-04-03 17:19:50 GMT)
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p.s.

I also noted from another Italian entry that "attaccio" could = fixing/fixation point


so, here, there is a reference to "fittings for securiing animals", which is fairly general

ode of Recommendations for the Welfare of Livestock
GOV.UK
https://assets.publishing.service.gov.uk › media
PDF
- accommodation and fittings for securing animals shall be constructed and maintained so that there are no sharp edges or protrusions likely to cause injury to ...


From what I have read there is a general move towards not tethering, chaining, or tying animals when they are in transport, because they can injure themselves if this is done.

Good luck!

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Note added at   1 godz. (2024-04-03 17:20:13 GMT)
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"fittings for securiing animals"


would be a better option