Wiring Connections for Nissan Frontier 2005 (Male & Fema

bI am a new user to these forums and used the search feature to find a similar topic but was unable to find such a post, so please forgive me if there is a related topic out there. I am also working on installing an amp with additional subwoofers into my 2005 Nissan Frontier. I have a King Cab (Jump Seats in rear) and the factory installed radio/single cd player in my cab. I was hoping to install my wiring without splicing anything, so I have been looking for the male and female connections for set radio. I was wondering if anyone knows where I can obtain these parts or if anyone has any suggestions for installation.