Amakhosi picked up their first ever competitive victory over Baroka this past weekend, walking away 2-1 victors from Peter Mokaba Stadium.
Castro became the third player to score on debut for Chiefs this season, as he bagged his side's winner in the 84th minute – 15 minutes after coming off the bench.
Komphela was full of praise for the Colombian frontman, while expressing his delight at his side's scoring form of late.
“Castro had an excellent debut. It is good to see new players scoring. It will build his confidence," commented Komphela on his club's website.
“We’ve been struggling to convert our build-ups into goals and I am glad we have scored four in our last two games.”
Log leaders Mamelodi Sundowns are up next for The Glamour Boys, and with just five points separating the two sides, Komphela is upbeat about the prospect of narrowing that gap to just two points come this weekend.
“It is game on now. It is still a long way to go, but it’s important to remain close to the leading pack," he added.
"It is showtime and it promises to be an interesting race to the finish.”
Chiefs will host The Brazilians at FNB Stadium on Saturday evening, with kick-off scheduled for 20h15.