I got it. Although the instructions weren't thoroughly clear on the bitmain page where to switch the jumer. It took alittle working on it but I finally did it. Thank you!
Too say the least. Took me several back-and-forth e-mails with Bitmain tech support to figure it out. But for others, its Jumper 4 - a 3 pin jumper. Simply change it to cover the other two pins. Then switch it back afterwards.
Note: we have been using this as an excuse to clean our machines. Once the hard cards are out, there is room to slide the control card out (if you disconnect the front fan). You can boot the sdhc card without any any cards or fans connected. We simply place a block of wood on top of the case, place the control card on that, plug into a space power supply, and clean the hash cards while the sdhc card is doing its thing. Then reassemble.