Middle name on mail in ballot signature or not?

I am mailing in my ballot. Need to sign the envelope and it has to match signature on file. My drivers license has my middle initial , but the signature on it does not. My voter registration has my middle initial, but no idea if the signature on file has it. Been on hold for an hour to try to speak to someone but doesn't look like it is happening.

Anyone know if you need your middle initial or if your DL signature is what is on the Voter Reg sig? I registered to vote while getting my DL.