3 Monitors - 2 PCs

[bags84]

Hi All.
i would like some assistance with this setup.

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I have the laptop working via a DELL WD19 Hub connected to 3 monitors ( 1 HDMI 2 x DP )

AS image suggest i have Gaming PC connected only once Directly to main monitor via DP

Any suggestion on what i need to buy , to make the easiest 1 cable move or 1 button press to switch systems from laptop to gaming pc .

Thanks