Beachball said:
When i say short towing Adapter it the one you have plug in to your car 13pin and look there is no cable
Not sure what you are saying above but to put an image on the board you will need to upload it to an image hosting website then paste the link into the box whwn you click the image link boardcode icon. It will look something like this with the HTML tags:
[ img] http://www.image host.xx/myimage [ /img ]
(I added spaces to get it to display)
Alternatively you can upload to Google Drive, then share the image. It won't display on the board as an image, but will be available for public view.