Happymodel ES900 wiring

[gruffalostereo]

I have two boot pads on my Happymodel ES900 RX. Which pad shoul I solder to the CLK pad on the VRX? Or it does not matter?

Another question: If my VRX has X and L channels, which channel should I set as a highiest (as it required in the manual)?

[pkendall64]

The "boot pad" closest to the GND connector is also a GND pad. The one slight further away is the actual "boot pad"

[gruffalostereo]

Hm, strange, in my case, everything is vice versa. Checked with the multimeter, upper one is connected with GND. And the pad just over the GND does not connected with ground.