Welcome to THP moedaddy! We make kombucha with black tea and turbinado sugar. Are you talking about using some of the end of the jar or are you talking about cutting in some of the scoby? I have never used kombucha in a pepper ferment though; normally I'm an all salt guy. I've used whey from yogurt before too and the ferment went well. I've also heard of good results from probiotic capsules too.
I can see of no reason why using some of the 'end of the jar floaties' from kombucha would not work to help start a ferment. I'm no expert by any means, but I'd say give it a try and post your results. With pics. We love pics!
Ok - that's why I asked. I didn't think bits of scoby would like being put into a pepper mash. That said, some of the liquid would certainly have live lab, and I'd be very interested to see how that would turn out in a pepper mash ferment. Please do proceed, and document here with pics.
Given the high levels of acetic acid in kombucha, if the actual ferment takes place in a similar manner you could have a finished product that is quite delicious.