SI4432:
top view
___________________________
1 gnd		    Ant 13|
2			14|
3			  |
4			  |
5  vcc			  |
6  sdo			  |
7  sdi			  |
8  clk			  |
9  sel			  |
10 irq			  |
11 sdn			  |
12 gnd			  |
----------------------------

connector :
SI4432 side	Arduino nano
_____		_____
|11/12|gnd,snd  |gnd|
|5    |vcc	|ACC|
|10   |irq	|D2 |
|9    |sel	|D10|(CS)
|8    |clk	|D13|(SCK)
|7    |sdi	|D12|(MISO)
|6    |sdo	|D11|(MOSI)
-----		-----
The MISO and MOSI may be switched, seems common in these radios