On mine I drilled holes up through the bottoms of the jack slots that
lined up with the pretapped holes in the side step brackets.

It is the type sold through Bus Boys or GoWesty.

http://www.gowesty.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=250-08001&Category_Code=

Mike

Neal Powers wrote:
> IM trying to instal a step under the sliding door it fits in the two slots
> made for the jack but sags how is it fastened on ? their are two holes that line
> up on each side but no  way to get to the top ,do i just use self taping
> screws?
>