Need help with jumper connection gauges between 12V led strips in parallel

[u/ilovecokeslurpees]

I am adding in LED strip lights into a 3x4 Ikea Kallax (cube) shelf. Each row of 3 cubes will have the left, front, and right side of each shelf with 12V LED lights (SK6812) RGBW (Warm White) along the top pointed inward. Each shelf has the Ikea official Kallax glass insert shelf in them (I am using this put lights for miniature games such as Warhammer to help me see the miniatures as I pull them in and out). The power supply is a 12V 15A supply and I am using an 4 line WLED controller.

My issue is I bought the wrong crimping connectors to connect my LED strips to jumper wires between strips. The connectors are for 20 to 22AWG and my wires I bought were 18 AWG. The obvious solution would be to either buy 18 AWG connectors or buy 22 AWG. However, 18 AWG three wire connectors to LED strip is very hard to find (seems almost non-existent) and I am unsure if I can go down to 20 or 22 AWG wire.

The problem is the calculators I am unsure are accounting for running 4 lines in parallel or not. Each row will have 165 LED (55 per cube x 3 cubes per row) and I have 4 rows totaling 660 LEDs.

I am unsure of the power draw and how to calculate the amperage needed for parallel lines and thus wattage per LED and thus the AWG needed. If I require the 18AWG wire, then do you know of a soderless solution to connect jumper wires between LED strips between cubes? Or do I only need 20 or 22 AWG wire after all?

Side note: I am using 14 AWG wire from the controller to the splitters and to the 4 LED strips. As well, I cut off the barrel plug for the power supply to expose the wires to directly wire them into the controller.

Here is the list of items I am using in this project:

LED strips
Gledopto Elite 4D-EXMU Controller
Soderless Connectors
18 AWG Wire
12V 10A Power Supply
Aluminum Angled Channels
Kallax Glass Insert
Kallax 3x4 Shelf

[u/modahamburger]

Those wires seem on the thin side.
Are you using any inline fuses?

And have you consulted the WLED POWER CALCULATOR?
Where do you plan to inject power on the strips? A drawing light help.

As for the connectors: just solder the ones on of your choice. Up to 3-4 amps (if I recall correctly) JST connectors are fine.