Detergent lid doesn't latch

The detergent lid doesn’t latch on my Maytag DW. I haven’t pulled the door apart to see exactly what I need. Should I get the motor Item Number: [COLOR=#0066cc]AP4110779[/COLOR] or should i get the Dual wax motor conversion Item Number: [COLOR=#0066cc]AP4009497[/COLOR] for this dishwasher. It is fairly old. thanks

got several views but no replies. Hopefully a technitioan from Appliance Pros can help. I am not sure if the Dual Wax Motor Conversion will work on my door because it is different than the detergent tray on my Maytag. thanks