The win improved the Guatemalan side to seven points atop Group 8, four ahead of CD Guadalajara, which will travel to Trinidad next week to play W Connection. Xelaju and Chivas are set to play October 25 in the Group finale in Mexico.
The loss eliminated the Caribbean side, which remained with one point and only one game remaining.
Taylor ran at the back post and nodded in the cross from Aleman, who found time and space on the left side to turn and curl a right-footed ball across the face of goal.
Joevin Jones drew W Connection even 2-2 in the 50th, cutting inside his defender 25 meters from goal and striking a left-footed drive that curled inside the right post past diving goalkeeper Fernando Patterson.
The Guatemalan host had more of the possession and had 10 shots on goal to W Connection's two.
It generated two corners in the first minute and went ahead on own-goal in the fourth minute. Sergio Morales curled a free kick into the six-yard box and Kern Cupid headed it past his own keeper as he tried to clear it.
But W Connection recovered quickly, converting on a counter involving four players. Kemuel Rivers combined with Shahdon Winchester, who dribbled down the left before feeding Hasim Arcia.
Arcia turned and split the Xelaju defense with a low rolling ball into the area and into the path of Rennie Britto, who was able to chip his shot over a sliding Patterson.
Israel Silva put Xelaju ahead again in the 38th, getting an unchallenged header to Kevin Arriola's cross from 10 meters.
The win was the 10th straight at home for Xelaju, which has not lost at Estadio Mario Camposeco since March 19, 2011, a streak of 36 matches.
W Connection, which won't begin its league season until October 2, was coming off a 2-0 win over Defence Force in the Trinidad Charity Shield match on Saturday.