Here is a map. Follow Airport Rd and you will see it.
https://www.google.com/maps/search/sxm+causeway/@18.0387917,-63.1122909,15z/data=!3m1!4b1

Always think a picture helps <img src="http://www.traveltalkonline.com/forums/images/graemlins/Grin.gif" alt="" />