As a very new RC person I find it odd that I might post some 'how to' information on the forum. However, I found it frustrating having to buy "Y" connectors pre-built and pay the rather healthy costs involved. I always needed some kind of extension and that was another fairly significant cost. My home is about 1.5 hours from the LHS. If I need something that's a little different I have to find it online, order it, pay shipping, and then wait for it to arrive.
One of the links on this forum suggested I take a look at the website below.
There, you can buy EVERYTHING you need to build or modify servo and/or battery connectors. They have the parts in bulk, although you don't have to buy bulk, and the tools that are needed to make your own connectors. That site also has PDF files that can teach you more about connectors and what they do than you'll ever need to know.
I used to wonder how in the heck to take the pin out of a servo connector. Now I am building custom connectors for the specific application I am working on. I also ordered a simple little circuit board that allows you to quickly make a "Y" yourself without trying to solder those little wires together.
Some people don't like to solder and to make the servo connectors, you don't have to. There's technical information written on that site that makes sense to a dummy. I didn't know there was a difference between JR and Futaba servo connectors. I downloaded a pdf that explains the differences and how to modify their connectors so it's universal. Did you know there's some voltage drop every time you add a connector? Or...what the resistance is using different gauges of wire?
I don't have any family working there and they paid me nothing for this. Well they did pay me in a way. They gave me the products I needed and the information about how to use the product and made me more independent. They are extremely fast getting orders processed and on the way. All my servos wires from here on out will be custom made for where they sit in the plane.