Cable Connection between AC300 & Transfer Switch

Which one of the output connections on the AC300 would be used to connect the AC300 to a transfer switch? The Reliance R310A (outdoor) transfer switch has a NEMA L14-30 input for the transfer switch end of the cable.

l14-30 is a 230 volt like on 230 volt gen sets=2 phases/neutral and ground
screws=green ground------copper (2) phases----silver or white -neutral

k9base
English please for us more common folks.

You would use the RV outlet on the AC300 which would require a TT-30P plug on that end of the extension cord.

-2phases=120 & 120 -240 volts= hot screw connectors=copper colored in the male or female
L14-30 plug ,now 1 green screw will be were green ground wire goes,-silver screw white neutral.
put volt meter on 120 and neutral-120 volts
the reliant transfer switch is made for 240 /120,ie generators or split phase inverters .if you are never going to use 240 volts ,like my simple 2 pole transfer switch/small load center is easy-er with 120 volt female plug on it for input.

or to plug in rv plug

First: Can one end of the cable use the L14-30 (which plugs into the transfer switch) and the other end the NEMA TT-30P which plugs into the AC300??? And if yes, would one use 10 AWG cable?

Second: k9base - - You said, "the reliant transfer switch is made for 240 /120,ie generators or split phase inverters .if you are never going to use 240 volts ,like my simple 2 pole transfer switch/small load center is easy-er with 120 volt female plug on it for input." I am a newbie to a lot of this, so I cannot make sense of this. Are you saying the Reliance R310A transfer switch CANNOT be used with the AC300, or are you saying something else?? Thank you very much.

A 10 gauge L14-30 generator cable is the way I would go and then get a L14-30 to TT-30P adapter, something like this: https://www.amazon.com/AC-WORKS-Generator-Transfer-Flexible/dp/B071ZNHG4B/ref=sr_1_13?crid=13TQWR88BD6O4&dchild=1&keywords=tt30p+to+l14-30r&qid=1628378480&sprefix=TT30P%2Caps%2C242&sr=8-13

Or go the other route and get a RV cord and use the same type of adapter.

Eric:
Looks great! So, you see no problem in using the Reliance R310 transfer switch (with appropriate adaptors!)??

If you need an outdoor transfer switch it should work great, would work indoors as well.

Deleted earlier post here and moved it to another topic.