How to use flash unit and ceiling lamp in photography? Ask the big boss for help

Describe it, just use it normally. There's nothing to say about this.

As far as the content is concerned, shaking is normal, so don't worry. You can connect the power board. There is a switch on the patch panel which is controlled by the patch panel. This is a trick of life. Suggest thinking more.

If you don't understand, keep asking. If you are satisfied, please adopt it.