We'd recommend the following for an MKH 30/8040 combo:
Stereo Windshield WS AE MS Kit
Order Code: 080203
With regard to Connbox choice, use of the MZX module on the MKH 8040 will require a 2XLR-3F input in the form of a Connbox CB3:
Connbox CB3 (2XLR-3F)
Order Code: 016924
Note that the MKH 30 will occupy about 30mm of end cap space in total, and this should be distributed evenly at each end (i.e. 15mm front and back) for optimum positioning.
Please consult the following chart for further information: