Does anyone have a suggestion how to run the cord for a Gerbing jacket thru' the BMW 1 piece ProRain 2 rain suit?

I like to stretch my riding season as much as possible but often in the spring and fall when it's raining it can also be cold so I like to wear heated gear under the rainwear. It seems strange to me that BMW hasn't allowed for this set up when they created the 1 piece suit....or did I miss something?

I would prefer not to have to cut it unless there is such a thing a stick on valve to run the cord thru' that would help maintain the 'waterproofness' of the suit.

Any ideas are appreciated!