futaba r203gf questions?

[cheifmudd]

hi, im new to the site and have only been in the hobby for about 2 months now. I just started to build a Axial Wraith kit with a futaba r203gf, savox 1256tg, and a velineon 3350X burshless system. I'm having a hard time finding a diagram on the polarity of the r203gf and was curious if i should be running a racers edge capacitor to help the servo out. The brushless system doesn't seem to want to turn off when the capacitor is plugged into the receiver(esc acts weird)...maybe my polarity is backwards? and I'm running a venom 5000mah 40c 2slipo...hope that was enough detail and help would be great thank you