The Hammers boss was under increasing pressure last week after consecutive drubbings at Nottingham Forest and Manchester City in the two different cup competitions.
Rather than heap more pressure on the boss, the owners backed him publicly to be the man to lead West Ham out of their poor position and victory in Cardiff saw them climb out of the relegation zone, with Gold and Sullivan watching from the stands.
McDonald acknowledged the pair have certainly helped the club's position.
"They have shown over the last week that they know that the team spirit is there and they are fighting for the manager and that the manager is the right man for the football club," he said.
"Mr Gold always comes down into the dressing room and the lads like to see him. It's great, especially when we are winning.
"He is a happy man after this win. If we don't win he comes in to try to pick the lads up. if we do win, he enjoys the craic with the lads, you know?
"He comes in and shakes Sam's hand and says 'well done', or 'we might be able to do this a little better'. He is certainly in this with everybody and this is his football club along with Mr Sullivan."