More form the same article
"The convoy consisted of 81 cargo trucks and 9 escort vehicles. All trucks bore the inscription “Humanitarian help from the Russian Federation”.
At 19:50 on 31 January, the convoy arrived, lined up at the customs area of the BCP and cargo trucks were inspected by Russian officers. The OM saw Ukrainian officers taking part in the inspection too."
That's humanitarian aid. Please also note that the trucks were inspected by Ukrainian officers
I believe I already posted video from one the convoys, it showed humanitarian aid inside the trucks.
PS: you wanted to show me a link that OSCE said that Russia moves weapons to Ukraine, still waiting to see it. Hint: there is none.