By default I think the PW6 comes with scart as standard and the PWD6 comes without any terminals.
I think digital directs PWD6 doesn't come with any terminal board as they don't mention it in the blurb.
Places like nexnix and av-sales normally bundle the scart or TM6Y (composite/component) board with the PWD6. If you need a wallmount etc then the nexnix and av-sales bundles work out about the same as buying the screen elsewhere and then adding the extras.
I have used them.....unfortunately my particular PW6 had a problem from new, but sorted out quickly thru' there customer service dept.
A pain to get to on the phone though....just used the sales line and asked to be transferred instead!!
You could also look at soundandvisiononline.com.....same prices as DD, but easier to get on the 'phone.