Dell Touchscreen computer - trying to set up a ThinkPad Universal USB-C DocK

I have a Dell touch screen all in one computer (Intel- Core 17).

My work computer is a ThinkPad (intel vPRO) and  have a ThinkPad Universal USB-C Dock.

I have 2 other monitor's currently hooked up to my Dell (using a j5 create)

I have the USB-C cord that came with the Thinkpad Universal dock -- it is running from the dock station (in back) to the Thinkpad lap top.

I have the power cord plugged into the dock station and of course into the wall

I purchased a HDMi cable and it is plugged into the back of the dock state going to the the Dell Computer (IN)

I purchased a displayport cable. That is going from the dock station to the Dell computer (Display slot)

I do have a white light on the doc station and it is charging my laptop -BUT NOT SHOWING ON ANY OF MY MONITORS (THE DELL COMPUTER NOR THE OTHER 2 ADDITIONAL MONITORS).

HELP PLEASE. I don't know what else to do.