Battery Questions

[shizzon]

Hello all, i'm new to this forum and wanted to introduce myself, the name is shawn and im a 20yr old college student. I recently got back into the rc bug after a 5 year hiatand have orded the new slash as well as the velineon system and a Maxamps 5000 mAH rtr lipo kit.
Eventually i plan on getting the new E-revo and setting it up for brushless and 6s lipo, my question to you guys is will i be able to connect two 3s packs instead of one 6s. This way i would have two packs that i could use on my slash instead of just one.

Thanks for any replys