I haven't tried with the self signed one, you may have an issue if it doesn't let you download the key. I don't think it will.
Double check me:
On the box you want to export from, Go to Security Services/HTTPS Proxy.
Click on the Edit Settings... button at the bottom. There should be a link there to download the cert...
Download it, check if the key is there. You can open the PEM file with NOTEPAD, and if the key is there, you'll see it...
The cert and key are in the config file... I'm not sure if the SMA will duplicate certs/keys between boxes, but I think it does, so if you're using one you may just need to import the config and push it down to both boxes again.
Otherwise you could load the config from one box onto the other (if you're running pre 8.0, remove the network stuff, if you're running 8.x make sure "Load Network Settings" box is unchecked.)
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...