Did you just buy the 9500ci? If so, and it's possible to return it, you might think about doing that and getting the Beltronics STIR PLUS. Instead. It has MUCH better performance at a similar price..... Read about it on radardetectorforum.net.It's not spliced it's actually just piggy backed. You just slide the wires down into the harness and make contact that way. Works flawless and no splice needed!
I have the 9500ci sitting in my garage waiting for install I just need to find good mounting points and get a weekend free and I'll install it.