se anexó a, b

what does se anexo mean. I am using it in a (concepto de revision) and the line reads (se anexo a, b, al #,s 6 & 8.) I wanted to use (agregue) but I was told it wasn't the way it was done. What I want to translate from english to spanish is (added a,b, to #s 6 & 8). Please tell me what is more acceptable to use in this situation.
  • "Se anexan" would mean "are attached", as in "se anexan X, Y y Z" = "X, Y and Z are attached"

    But I'm completely confused. Are you translating Spanish to English or English to Spanish? Which is your source text?