The 23-year old English forward, who while on loan helped Orlando City take out the USL Pro title this season, netted the match-winning goal in the 63rd minute as SKC came from behind to beat Houston Dynamo 2-1 in the Eastern Conference final second leg.
Former Norwich City youth academy attacker Dwyer, who scored 19 goals in 14 matches in the third division for the Lions, including four in a stunning performance in the 7-4 title win over Charlotte Eagles, says he now feels more comfortable in front of goal.
"It's been a crazy season," Dwyer said. "It hasn't really sunk in yet. I'm just pleased, and I'm excited, but we've got two weeks' time so I'm trying to calm down right now.
"Recently, the last couple years, a problem with me has been I've been a bit too excitable in front of goal.
"I tried to be more calm and I've had a lot more opportunities now. I've kind of calmed it down and I think that obviously helped - something I've been trying to concentrate on."
He added: "(Head coach) Peter (Vermes) said to me on Friday that, 'You don't have to hit the top corner, just hit the net.'
"Obviously, that's in the back of my head, and I just finished it off."
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