Here a video of what setup you may have. Tho yours is 6v this is the 12v converted to 24v you can get the entire 12v change over if you have Weelye part check it out let us know how you make out.

You can buy the part individually as well.

Wiring overview https://youtu.be/b_Ajbs-E7O0

Complete Weelye Harness 12v https://www.amazon.com/dp/B082QXXNG8/ref=cm_sw_r_cp_apa_fabc_C4k5FbAPB0CBF?_encoding=UTF8&psc=1