Something is wrong or missing in the OP's post.
Jim's post is incorrect.
The M1 comes with battery leads attached. They have .250 insulated Faston tabs for the battery connection.
The transformer should use 18 AWG cabling as a minimum. You should never use a 4/22, even doubled up, for AC power connections. It's the wrong way to do it. Also, read page 10 of the installation manual for the M1...all spelled out there.