I'm afraid it doesn't. Here is why:
The Sennheiser ME66 K6 is broken down into -
The Sennheiser ME66 - 221mm
The K6 power module - 94mm
(The XLR connector - approx 50mm)
The total Microphone length of the ME66 with K6 module is 315mm (365mm inc XLR)
The Medium Super-Shield is designed for microphone lengths between 200mm-250mm.
This means the ME66 K6 is too long to fit within the Medium Super-Shield.
The ideal Windshield solution for the M66 K6 is:
Modular Windshield WS 5 Kit
Order Code: 086005
Web link: http://www.rycote.com/products/086005