Understand that. The manual assumes that the user has some certain basic knowledge regarding certain things (i e how basic MIDI is used etc). You´ll need to check the PC receive box, under MIDI in System Menu in your OT. So as long as you are transmitting the PC# message from your DAW on the channel set for the OT to receive such messages on, you should be fine.
I don´t remember if the pattern changes happens instantly upon a PC# received. Or if the sequencer will finish its run first before changing, but you will find that out. IIRC, Bank Select messages are only needed from your other device as soon you need to access any bank/pattern higher than 127.
If you are able to use an MIDI monitor software, I strongly recommend you to do that. A lot can be learned/verified regarding your OT when combining it with other devices (i e seeing that commands are sent etc).
Let us know how it goes, or if you have further questions…