Nineteen-year-old academy product Smithies, tracked by many clubs, including Stoke, wants to play in the Premier League eventually.
But Smithies feels he can achieve that target at the Galpharm Stadium and insists he does not pay much attention to January transfer window speculation.
He said: "Huddersfield Town is the team I've always supported and I'm very happy playing here. I don't pay much attention to the rumours.
"It's nice to be linked with other clubs as it shows I must be doing something right. But I'm just concentrating on doing my best for Town.
"The gaffer (Lee Clark) wants to take us to the Premier League. That's where we all want to be and it's good that the management are so ambitious."
The young England international Smithies added that even the players were surprised by a publicity stunt which saw the Terriers wear a red and yellow striped kit.
The club's traditional blue and white stripes were dropped in favour of the Yorkshire Air Ambulance's colours as a one-off fund-raiser.
It was planned by Town officials as a 'surprise' and Smithies said: "We didn't see the kit until it was put out at 2pm. It was a bit of fun for a good cause."
Striker Jordan Rhodes took his tally to 17 goals for the season with a brace which secured Huddersfield's first win over the Shrimpers in 15 years.
He tapped in a cross from restored left-back Robbie Williams in the first half and then headed in a corner from Anthony Pilkington before Scott Spencer grabbed a late consolation for the visitors.
Huddersfield Town: Smithies; Peltier, P Clarke, N Clarke, Williams; Pilkington, T Clarke, Kay (Drinkwater 64), Roberts; Novak (Robinson 79), Rhodes (Simpson 82). Unused substitutes: Eastwood, Skarz, Collins and Ainsworth.
Southend United: Mildenhall; Sankofa, Francis, Barrett, Malone; Grant (Christophe 77); Laurent, McCormack, Moussa, Scannell (Spencer 77); Barnard (Joyce 85). Unused substitutes: Joyce, Walker, Herd, O'Keefe.
Referee: E Ilderton (Greater Manchester).
Man of the match: Jordan Rhodes.
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