I have the spektrum sr410 receiver in my traxxas e revo. I just installed the castle mamba monster 2 system which has a waterproof esc and a fan built in. To make the esc fan work, you have to plug it into the receiver port to receive power. I have my esc, fan, two servos plugged into my sr410 receiver and I want to add a fan to my motor so it doesnt burn out. Is there any Y-Harness that I can get to get around this problem or am I stuck?

You need a 1 male to 2 female y connector. Just use it with the fan port.