id try red to B+ and black to Strobe Trigger but dont hold me on that ive not hooked up the rx-18 yet and my stug has the hole harness connector and on my T-34 i put in the DBCRC2 it has a two wire hook up for flash red/black wires match up to T-34 . on the connector its red/black/blue on the left of the connector it go's to flash . Bill at rc command would know better .

thanks
jimmy