Questione giuridica chiave
Whether the cantonal court arbitrarily found that the parties initially agreed that the appellant would provide a metal connection.
Decisione estratta
The finding was sustainable because it was based on concordant witness testimony and the written offer did not decisively contradict it.
Motivazione estratta
The Federal Court held that the cantonal court could prefer precise, consistent testimony over the incomplete written offer; no arbitrary fact-finding was shown.