I get permission to fly an area at no cost and then show them the photos or videos. If they want the material then I talk price. Out of many, many flight I have been turned down once and I still got to fly my ACP [Aerial Camera Platform].
Here is a company that may have the pins.
http://www.digikey.com/product-search/en/connectors-interconnects/rectangular-connectors-spring-loaded/1442900?k=&pkeyword=&pv28=2333&pv27=3&FV=fff40016%2Cfff80454&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25
I sometimes hand catch my Q500+. Have not tried it with my "H". When I hand catch I look and study the drone like it was a irate eagle. If it is not completely calm I will find a safe place to land it. I have caught it many times safety. If you do this be very careful.
You may want to do a cleaner job. As for me I only care about function. This works extremely well for me. At the end of the video there is a diagram on wiring the alarm.