Question on Citation 7.1 bridge jumper

I recently bought a used Citation 7.1 amp. The thing was virtually brand new in the original packing and box. I really only wanted to use it in two channel mode by bridging the four channels into two 400 wpc outputs. I read the docs and it mentions "the supplied bridge jumper" which is missing from my amp. I took a 14 awg zip cord and stripped both ends clean and twisted them together to double the wire size. I left the insulation on the middle part of the wire. I used this to jumper and bridge the amp. It seems to work okay, but I wonder if there is a potential to damage this amp by doing this. I don't have a clue what the specs on the jumper are and can't find a picture. I sent HK an email asking if they still had jumpers but haven't received a reply, yet. The amp does sound great and was a huge improvement over the Onkyo TX-DS898 I was using to drive the speakers. Of course, I'm the paranoid sort so I thought I would present this question to all the knowledegable folks on this forum. Any thoughts will be appreciated. Thanks.