Re: Mixing SD and Fender Single Colis
The only proper way to check is to compare the coil wind directions and the magnetic polarity relationships of all three pickups. Leave the SSL-6 conductors long, just in case they need to be reversed.
FWIIW, the Ant Texas Hot, Bridge works perfectly with Fender Tex-Mex single coils. A Twangbanger needs everything reversing in order to "co-operate" with a pair of Ant II Surfers.
EDIT - On some Fender MIM guitars, the bobbins are plastic. It is possible to persuade the individual rod magnets out of the bobbin with no fear of disturbing the coil. If the appearance of the conductor colours in important to you, reverse the polarity of the middle pickup.