Chris Cadden and Elliott Frear relented though, leaving them with just 10 men for much of the second half.
“They are quite a young side and maybe they saw Saturday’s game at Kilmarnock as an opportunity to get away from the pressure at Ibrox,” said Carson.
“If we had lost against Dundee that would have been five defeats on the bounce so that result just stems the bleeding a bit.
It doesn’t sound great to get a draw against Dundee but it’s a massive point for us - a turning point - and we need to kick on now.” Cadden and Frear won’t be available for the game at Ibrox, but Carson and defender Hartley will patch themselves up and pull on the boots once more.
Wayne Mackintosh levelled before Ross Still was sent off for Huntly with goals from Craig Mc Keown, Graeme Rodger and player-manager Paul Lawson (2) sealing United’s win.
Formartine assistant manager Russell Anderson said: “In a tough game to win 6-2 away from home I think you are happpy just to get through to the next round.
The Motherwell keeper managed to last the 90 minutes despite the shoulder injury that saw him sit out of the previous three matches causing him severe discomfort.