How can I add a css to my Business Data webpart to resize the oob textbox that uses sharepoint css

I have a page wherein I inserted a Business Data webpart list, and I want to resize the textboxes because it stretches to the rightmost part of the page and I have to scroll to the left if I want to add another parameter.

Here's a screenshot:

What I want to is to insert a style in the first <td valign="middle" to make it <td valign="middle" style="width:131px"

and I also want to add another style in the select name="" so it will be select name="" ..... style="width:300px"

how will I do this in a content editor webpart?