Let me suggest You (or better, the rental house) make 2 tiny BNC cabels, 2 meters long, that ends with 2 MALE BNC - from d-21 to You. A 10 meters thick BNC, female to female - from You to DIT. That way You can disconnect from the DIT when ever you need to. The camera is nice for steadicam, besides the cables. Onboard recorder would have made more sense.
Appel