pigtail connectors for Trailmaster 150 XRS

[Mr. Magoo]

I will begin by apologizing for my ignorance. I am new to this through my son and his best Christmas gift to date.

I am installing a stereo or sound system in my son's kart. instead of wiring direct to the battery, I had ordered a pigtail connector so to jump into the electrical system where the key/ignition connector is. I received a pigtail with mini-connectors and this is way too small for the wanted connection at the ignition, as stated. Now, for my ignorance to shine brightly... where on this kart can I find a mini-connector to pigtail onto/into? I have an overhead light system, a lighted whip/bar on the back and these connectors are again, too large. I thought it easier to find a mini-connector instead of fighting to get what I had initially ordered. Any help will be so very appreciated and thank you for all whom take the time with this entry.