I am not sure what they looked like inside, I had my electronic guy do it for me, the link above to the SP will also get it done for like 10 + shippping, so......I paid my guy $16, he did it using the above instructions.
I ran it to the SP Batt box, and I am glad I got the one with the bass rolloff, because they are a really bassy set of mics, actually it all sounded really good, but the bass needed a bit of rolloff. So, my recco is, send it to Sound Pros with the above link so kindly provided, and then buy the SP batt box with the adjustable roll off. You will be pleased if you do. It is a HUUUUUGE step up in quality from the old "Corpsesound binaurals" that I've been using. And, if you can, get the DPA's from the Broadway sellers on E Bay. The whole set up incl batt box cost me under 500, whereas the "HEB's " that Len Mosco offers are over 2x that plus the usual Corpsesound high shipping charges (and he even charges you for using your visa card!!)
ilduc