OET interlinear 2 SAM 6:3

uW Translation Notes:

Note 1 topic: figures-of-speech / explicit

אֲשֶׁ֣ר בַּ⁠גִּבְעָ֑ה

(Some words not found in UHB: and,they_made_to_ride DOM ark_of the=ʼElohīm to/towards cart new and,they,carried_it from,the_house_of ʼAⱱīnādāⱱ which/who [was]_on,hill and,Uzzah and,Ahio sons_of ʼAⱱīnādāⱱ driving DOM the,cart new )

The author assumes that his readers will know that by on the hill, he means a certain hill within the city of Baalah, that is, Kiriath Jearim. Since modern readers would not recognize the identity of this hill, it may be more natural to speak of it in general terms. If you have already translated the book of 1 Samuel, see how you translated the similar expression in 1 Samuel 7:1. Alternate translation: [which was on a hill]

Note 2 topic: figures-of-speech / metonymy

אֶת־הָ⁠עֲגָלָ֥ה חֲדָשָֽׁה

DOM DOM the,cart (Some words not found in UHB: and,they_made_to_ride DOM ark_of the=ʼElohīm to/towards cart new and,they,carried_it from,the_house_of ʼAⱱīnādāⱱ which/who [was]_on,hill and,Uzzah and,Ahio sons_of ʼAⱱīnādāⱱ driving DOM the,cart new )

The author is speaking of the new cart to mean the oxen that were pulling the cart. If it would be helpful in your language, you could use an equivalent expression or plain language. Alternate translation: [the oxen that were pulling the new cart]