boc_button use for content etc

I am confused by the use of boc_button. It renders the button properly in content but there is nowhere to add the href value for the button click event.

[boc_button btn_content="Buy Now" target="_self" size="btn_medium" color="btn_white" btn_style="btn_outline" border_radius="btn_circled" icon="icon icon-arrow-right6" icon_pos="icon_pos_after" icon_effect="btn_icon_anim_out" ]