Yes, that part number appears to be the complete replacment harness including the dash sub harness as well. I'm sure if you phoned the tech desk they could confirm that for you before you ordered. Just use the 1-800 number shown on the website.
'73 Midget (V6)
'59 MGA (I6) under construction
'73 Lotus Europa
"There is a fine line between a hobby and mental illness"