Kunchun mudra, 2 versions?

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i have found 2 versions of Kunchun mudra:

 

http://209.85.129.104/search?q=cache:H_ckVAOSOuQJ:www.kundalini-matashakti.com/w\

orddocuments/Sets%2520and%2520Kriyas/Adrenals%2520and%2520Kidneys.doc+%22kunchun\

+mudra%22 & hl=en & ct=clnk & cd=4

with

Right forearm in front of chest at solar plexus level, palm facing down

Left hand next to left ear, palm pressed back

 

and the other

http://www.pinklotus.org/-%20KY%20Maha%20Mudras%20Kunchun%20Mudra%20fp.htm

with

De left lowerarm is in front of the chest en parallel to the floor,

the palm of the hand facing down. The right upperarm is sideways, with

the lowerarm vertical on the floor, the elbow sharply bent.

 

Which one?

 

clear mind to all

marco from CH