How should I contact my manager?

I was recently hired at taco bell, but first I had to fill out a bunch of documents for the on-boarding process. I finished my part, and now the manager has to fill some stuff out. The manager is the one who called me to come in for an interview. I went in and told him I'm done with the documents. He said if I don't hear back from them in a week then text him, and he told me i have his number. I thought I did but now I can't find it. He really wanted me to text him, so that it's on record. I looked though my recents and can't find his number. I see numbers that look like his but I'm not sure. Should i just call taco bell and ask for his number again?

How should I contact my manager?
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