I was given a quick disconnect by a buddy because my TM plug broke. I plan on connecting it but I'm not sure if the quick connect cables are compatible with whats there now. I have 6 gauge running from the batteries to where the old switch was and what ever is standard for  12V 42lb thrust TM. Here is a picture of the quick disconnect. Thanks

I think the number on those are SB-50's and they are made for #6 cable, but those have already been used.  IMO those are the best you can use for TM connectors. Pull them appart, look inside the end where the terminals are and you will see a flat piece of spring steel up against the bottom of the terminals.  This is what locks the terminal in, push down on the piece of metal to get it away from the bottom of the terminal and you can pull the terminals out the cable end.   Once they have been crimped, they are not much good so you really need to get two new ones.  You can get them from Cabela's, BPS and Graingers.   Grainger's number 3BY20 and are approx $7.00 each.   The only draw back is when running a 12/24 motor, you need three terminals.  To get that with those connectors, you have to use two sets.  If by chance the cables were just soldered in and not crimped, you can reuse those.

Thanks for the info.

 Those are the same style of connector that they use in electric forklifts. I don't know if you've ever seen a battery for an electric forklift but if they are good enough for that then they are plenty good for TM's. I've worked on forklifts and batteries and changed these connectors and they are easy to take the old pins out. Granted these are a scaled down version but as far as ease of use and quality I think they would work the best. Probably much better to convert to these rather than staying with the old Attwood style connectors. A different style of mounting on the floor of a boat but not a problem. I didn't see replacement pins on the Cabellas site but it is only $15 for the M and female together. I wish I had seen this 2 weeks ago I just replaced mine with brand new but old style ones.

Here's the link to the site. http://www.cabelas.com/cabelas/en/templates/product/standard-item.jsp?_DARGS=/cabelas/en/common/catalog/item-link.jsp_A&_DAV=search&id=0001110011811a&navCount=5&podId=0001110&parentId=&masterpathid=&navAction=push&catalogCode=IH&rid=&parentType=&indexId=cat21380&hasJS=true