In order to find a replacement side marker light for your 2015 Dynamax Dynaquest I recommend taking some measurements of the current light. There is not a direct replacement available so you will need to find something that is a close match and ideally uses the same mounting hole dimensions.
The Miro-Flex Thinline LED Trailer Clearance or Side Marker Light # MCL63AB you looked at uses the same 2 prong plug you have now and measures 4-1/16" long x 1-1/4" tall x 1-1/8" thick. The distance... view full answer...