contour line with custom label 271

Question

https://transparentgov.net:3200/googlemaps271/default?layer_id=0&layer=contour_socal&center_lat=34.230302202665996&center_long=-115.51494228161818&center_zoom=17&url=https%3A%2F%2Fgis.la-quinta.org%2Farcgis%2Frest%2Fservices%2Fcoordinate_systems%2Fsouthern_california_contour%2FMapServer&overlayType=overlayType_image&dynamicLabelField=customlabel&panto=0&dynamicLabelFieldArray=11%2C13&labelSize=3