Subjective interpretation of verses from skanda 6 of Srimad Bhagavatam

[RedFox]

I'm confused about how I interpret these verses form the 6th skanda of the Srimad Bhagavatam. These are from the Narayana Kavacha.

...kṛta-svāṅga-kara-nyāso mantrābhyāṁ vāg-yataḥ śuciḥ
nārāyaṇa-paraṁ varma sannahyed bhaya āgate
pādayor jānunor ūrvor udare hṛdy athorasi
mukhe śirasy ānupūrvyād oṁkārādīni vinyaset
oṁ namo nārāyaṇāyeti viparyayam athāpi vā

So here, should 'oṁkārādīni' be interpreted as 'preceding each syllable with the omkara', or 'begininng with the omkara' in the nyasa?

Same goes with this one -

kara-nyāsaṁ tataḥ kuryād dvādaśākṣara-vidyayā
praṇavādi-ya-kārāntam aṅguly-aṅguṣṭha-parvasu

'praṇavādi-ya-kārāntam' is obviosuly 'starting the the pranava and ending with the 'ya' syllable'.

So should the previous one also be interpreted that way? (ie Placing each syllable of oṁ namo nārāyaṇā in the places mentioned (om, na, mo etc.)? Or should each syllable of the mantra be preceded by om, and then be placed (om om, om na, om mo etc.)?

It has been interpreted (and translated) differently in different places - seeking final clarity on this. Personally, I do not think it can be interpreted as 'each syllable should be preceded by the omkara', since the next line of the verse states that the nyasa can also be done in the reverse order (samhara nyasa), which would mean beginning with 'ya'. So, the initial suggestion of oṁkārādīni must mean 'starting with the om syllable', rather than 'preceding each syllable with the omkara'. 

Clarification needed. 

[Vishvas Vasuki (Vishvas)]

https://groups.google.com/g/hindu-vidya/c/jPsGDvbog38/m/2J9HQ7S5DQAJ इति प्रत्युक्तम्।