The Houston school district’s bond proposal won a much-needed, though not unanimous, endorsement from the city’s largest business organization on Wednesday. The Greater Houston Partnership would not disclose the specific vote, taken during a closed meeting, but the group’s president, Jeff Moseley, said some business leaders were troubled that school officials did not solicit opinions from the community while crafting the $805 million bond proposal. The partnership, which has backed the district’s past two bond issues, initially withheld support for the Nov. 6 referendum after black community leaders criticized the proposal. “Ultimately, it came down to, ‘What’s the best thing to do for the boys and girls in the district?’ ” Moseley said. “And we think it’s right for the boys and girls and for our regional economy.” The partnership’s resolution did, however, ask district officials to reach out to the community.